diff --git a/poetry.lock b/poetry.lock
index 33635d0..59aeeb6 100644
--- a/poetry.lock
+++ b/poetry.lock
@@ -1,10 +1,9 @@
-# This file is automatically @generated by Poetry 1.4.1 and should not be changed by hand.
+# This file is automatically @generated by Poetry 1.5.1 and should not be changed by hand.
 
 [[package]]
 name = "appdirs"
 version = "1.4.4"
 description = "A small Python module for determining appropriate platform-specific dirs, e.g. a \"user data dir\"."
-category = "dev"
 optional = false
 python-versions = "*"
 files = [
@@ -16,7 +15,6 @@ files = [
 name = "atomicwrites"
 version = "1.4.0"
 description = "Atomic file writes."
-category = "dev"
 optional = false
 python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*"
 files = [
@@ -28,7 +26,6 @@ files = [
 name = "attrs"
 version = "21.2.0"
 description = "Classes Without Boilerplate"
-category = "dev"
 optional = false
 python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*, !=3.4.*"
 files = [
@@ -46,7 +43,6 @@ tests-no-zope = ["coverage[toml] (>=5.0.2)", "hypothesis", "mypy", "pympler", "p
 name = "black"
 version = "21.7b0"
 description = "The uncompromising code formatter."
-category = "dev"
 optional = false
 python-versions = ">=3.6.2"
 files = [
@@ -72,7 +68,6 @@ uvloop = ["uvloop (>=0.15.2)"]
 name = "click"
 version = "7.1.2"
 description = "Composable command line interface toolkit"
-category = "dev"
 optional = false
 python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*, !=3.4.*"
 files = [
@@ -84,7 +79,6 @@ files = [
 name = "colorama"
 version = "0.4.4"
 description = "Cross-platform colored terminal text."
-category = "dev"
 optional = false
 python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*, !=3.4.*"
 files = [
@@ -96,7 +90,6 @@ files = [
 name = "flake8"
 version = "3.9.2"
 description = "the modular source code checker: pep8 pyflakes and co"
-category = "dev"
 optional = false
 python-versions = "!=3.0.*,!=3.1.*,!=3.2.*,!=3.3.*,!=3.4.*,>=2.7"
 files = [
@@ -113,7 +106,6 @@ pyflakes = ">=2.3.0,<2.4.0"
 name = "flake8-polyfill"
 version = "1.0.2"
 description = "Polyfill package for Flake8 plugins"
-category = "dev"
 optional = false
 python-versions = "*"
 files = [
@@ -128,7 +120,6 @@ flake8 = "*"
 name = "ghp-import"
 version = "2.0.1"
 description = "Copy your docs directly to the gh-pages branch."
-category = "dev"
 optional = false
 python-versions = "*"
 files = [
@@ -146,7 +137,6 @@ dev = ["flake8", "markdown", "twine", "wheel"]
 name = "gitdb"
 version = "4.0.7"
 description = "Git Object Database"
-category = "dev"
 optional = false
 python-versions = ">=3.4"
 files = [
@@ -159,14 +149,13 @@ smmap = ">=3.0.1,<5"
 
 [[package]]
 name = "gitpython"
-version = "3.1.30"
-description = "GitPython is a python library used to interact with Git repositories"
-category = "dev"
+version = "3.1.32"
+description = "GitPython is a Python library used to interact with Git repositories"
 optional = false
 python-versions = ">=3.7"
 files = [
-    {file = "GitPython-3.1.30-py3-none-any.whl", hash = "sha256:cd455b0000615c60e286208ba540271af9fe531fa6a87cc590a7298785ab2882"},
-    {file = "GitPython-3.1.30.tar.gz", hash = "sha256:769c2d83e13f5d938b7688479da374c4e3d49f71549aaf462b646db9602ea6f8"},
+    {file = "GitPython-3.1.32-py3-none-any.whl", hash = "sha256:e3d59b1c2c6ebb9dfa7a184daf3b6dd4914237e7488a1730a6d8f6f5d0b4187f"},
+    {file = "GitPython-3.1.32.tar.gz", hash = "sha256:8d9b8cb1e80b9735e8717c9362079d3ce4c6e5ddeebedd0361b228c3a67a62f6"},
 ]
 
 [package.dependencies]
@@ -176,7 +165,6 @@ gitdb = ">=4.0.1,<5"
 name = "importlib-metadata"
 version = "4.5.0"
 description = "Read metadata from Python packages"
-category = "dev"
 optional = false
 python-versions = ">=3.6"
 files = [
@@ -195,7 +183,6 @@ testing = ["flufl.flake8", "importlib-resources (>=1.3)", "packaging", "pep517",
 name = "iniconfig"
 version = "1.1.1"
 description = "iniconfig: brain-dead simple config-ini parsing"
-category = "dev"
 optional = false
 python-versions = "*"
 files = [
@@ -207,7 +194,6 @@ files = [
 name = "invoke"
 version = "1.5.0"
 description = "Pythonic task execution"
-category = "dev"
 optional = false
 python-versions = "*"
 files = [
@@ -220,7 +206,6 @@ files = [
 name = "jinja2"
 version = "3.0.1"
 description = "A very fast and expressive template engine."
-category = "dev"
 optional = false
 python-versions = ">=3.6"
 files = [
@@ -238,7 +223,6 @@ i18n = ["Babel (>=2.7)"]
 name = "markdown"
 version = "3.3.4"
 description = "Python implementation of Markdown."
-category = "dev"
 optional = false
 python-versions = ">=3.6"
 files = [
@@ -253,7 +237,6 @@ testing = ["coverage", "pyyaml"]
 name = "markupsafe"
 version = "2.0.1"
 description = "Safely add untrusted strings to HTML/XML markup."
-category = "dev"
 optional = false
 python-versions = ">=3.6"
 files = [
@@ -332,7 +315,6 @@ files = [
 name = "mccabe"
 version = "0.6.1"
 description = "McCabe checker, plugin for flake8"
-category = "dev"
 optional = false
 python-versions = "*"
 files = [
@@ -344,7 +326,6 @@ files = [
 name = "mdx-truly-sane-lists"
 version = "1.3"
 description = "Extension for Python-Markdown that makes lists truly sane. Custom indents for nested lists and fix for messy linebreaks."
-category = "dev"
 optional = false
 python-versions = "*"
 files = [
@@ -359,7 +340,6 @@ Markdown = ">=2.6"
 name = "mergedeep"
 version = "1.3.4"
 description = "A deep merge function for 🐍."
-category = "dev"
 optional = false
 python-versions = ">=3.6"
 files = [
@@ -371,7 +351,6 @@ files = [
 name = "mike"
 version = "1.1.2"
 description = "Manage multiple versions of your MkDocs-powered documentation"
-category = "dev"
 optional = false
 python-versions = "*"
 files = [
@@ -393,7 +372,6 @@ test = ["coverage", "flake8 (>=3.0)", "shtab"]
 name = "mkdocs"
 version = "1.4.3"
 description = "Project documentation with Markdown."
-category = "dev"
 optional = false
 python-versions = ">=3.7"
 files = [
@@ -422,7 +400,6 @@ min-versions = ["babel (==2.9.0)", "click (==7.0)", "colorama (==0.4)", "ghp-imp
 name = "mkdocs-material"
 version = "7.3.6"
 description = "A Material Design theme for MkDocs"
-category = "dev"
 optional = false
 python-versions = "*"
 files = [
@@ -442,7 +419,6 @@ pymdown-extensions = ">=9.0"
 name = "mkdocs-material-extensions"
 version = "1.0.1"
 description = "Extension pack for Python Markdown."
-category = "dev"
 optional = false
 python-versions = ">=3.5"
 files = [
@@ -457,7 +433,6 @@ mkdocs-material = ">=5.0.0"
 name = "mypy-extensions"
 version = "0.4.3"
 description = "Experimental type system extensions for programs checked with the mypy typechecker."
-category = "dev"
 optional = false
 python-versions = "*"
 files = [
@@ -469,7 +444,6 @@ files = [
 name = "packaging"
 version = "20.9"
 description = "Core utilities for Python packages"
-category = "dev"
 optional = false
 python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*"
 files = [
@@ -484,7 +458,6 @@ pyparsing = ">=2.0.2"
 name = "pathspec"
 version = "0.8.1"
 description = "Utility library for gitignore style pattern matching of file paths."
-category = "dev"
 optional = false
 python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*, !=3.4.*"
 files = [
@@ -496,7 +469,6 @@ files = [
 name = "pep8-naming"
 version = "0.12.1"
 description = "Check PEP-8 naming conventions, plugin for flake8"
-category = "dev"
 optional = false
 python-versions = "*"
 files = [
@@ -512,7 +484,6 @@ flake8-polyfill = ">=1.0.2,<2"
 name = "pluggy"
 version = "0.13.1"
 description = "plugin and hook calling mechanisms for python"
-category = "dev"
 optional = false
 python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*"
 files = [
@@ -527,7 +498,6 @@ dev = ["pre-commit", "tox"]
 name = "py"
 version = "1.10.0"
 description = "library with cross-python path, ini-parsing, io, code, log facilities"
-category = "dev"
 optional = false
 python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*"
 files = [
@@ -539,7 +509,6 @@ files = [
 name = "pycodestyle"
 version = "2.7.0"
 description = "Python style guide checker"
-category = "dev"
 optional = false
 python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*"
 files = [
@@ -551,7 +520,6 @@ files = [
 name = "pyflakes"
 version = "2.3.1"
 description = "passive checker of Python programs"
-category = "dev"
 optional = false
 python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*"
 files = [
@@ -563,7 +531,6 @@ files = [
 name = "pygments"
 version = "2.15.1"
 description = "Pygments is a syntax highlighting package written in Python."
-category = "dev"
 optional = false
 python-versions = ">=3.7"
 files = [
@@ -578,7 +545,6 @@ plugins = ["importlib-metadata"]
 name = "pymdown-extensions"
 version = "10.0"
 description = "Extension pack for Python Markdown."
-category = "dev"
 optional = false
 python-versions = ">=3.7"
 files = [
@@ -594,7 +560,6 @@ pyyaml = "*"
 name = "pyparsing"
 version = "2.4.7"
 description = "Python parsing module"
-category = "dev"
 optional = false
 python-versions = ">=2.6, !=3.0.*, !=3.1.*, !=3.2.*"
 files = [
@@ -606,7 +571,6 @@ files = [
 name = "pytest"
 version = "6.2.4"
 description = "pytest: simple powerful testing with Python"
-category = "dev"
 optional = false
 python-versions = ">=3.6"
 files = [
@@ -631,7 +595,6 @@ testing = ["argcomplete", "hypothesis (>=3.56)", "mock", "nose", "requests", "xm
 name = "python-dateutil"
 version = "2.8.1"
 description = "Extensions to the standard Python datetime module"
-category = "main"
 optional = false
 python-versions = "!=3.0.*,!=3.1.*,!=3.2.*,>=2.7"
 files = [
@@ -646,7 +609,6 @@ six = ">=1.5"
 name = "pyyaml"
 version = "5.4.1"
 description = "YAML parser and emitter for Python"
-category = "dev"
 optional = false
 python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*, !=3.4.*, !=3.5.*"
 files = [
@@ -685,7 +647,6 @@ files = [
 name = "pyyaml-env-tag"
 version = "0.1"
 description = "A custom YAML tag for referencing environment variables in YAML files. "
-category = "dev"
 optional = false
 python-versions = ">=3.6"
 files = [
@@ -700,7 +661,6 @@ pyyaml = "*"
 name = "regex"
 version = "2021.4.4"
 description = "Alternative regular expression module, to replace re."
-category = "dev"
 optional = false
 python-versions = "*"
 files = [
@@ -751,7 +711,6 @@ files = [
 name = "semver"
 version = "2.13.0"
 description = "Python helper for Semantic Versioning (http://semver.org/)"
-category = "main"
 optional = false
 python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*"
 files = [
@@ -763,7 +722,6 @@ files = [
 name = "six"
 version = "1.16.0"
 description = "Python 2 and 3 compatibility utilities"
-category = "main"
 optional = false
 python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*"
 files = [
@@ -775,7 +733,6 @@ files = [
 name = "smmap"
 version = "4.0.0"
 description = "A pure Python implementation of a sliding window memory map manager"
-category = "dev"
 optional = false
 python-versions = ">=3.5"
 files = [
@@ -787,7 +744,6 @@ files = [
 name = "toml"
 version = "0.10.2"
 description = "Python Library for Tom's Obvious, Minimal Language"
-category = "dev"
 optional = false
 python-versions = ">=2.6, !=3.0.*, !=3.1.*, !=3.2.*"
 files = [
@@ -799,7 +755,6 @@ files = [
 name = "tomli"
 version = "1.2.1"
 description = "A lil' TOML parser"
-category = "dev"
 optional = false
 python-versions = ">=3.6"
 files = [
@@ -811,7 +766,6 @@ files = [
 name = "verspec"
 version = "0.1.0"
 description = "Flexible version handling"
-category = "dev"
 optional = false
 python-versions = "*"
 files = [
@@ -826,7 +780,6 @@ test = ["coverage", "flake8 (>=3.7)", "mypy", "pretend", "pytest"]
 name = "watchdog"
 version = "2.1.2"
 description = "Filesystem events monitoring"
-category = "dev"
 optional = false
 python-versions = ">=3.6"
 files = [
@@ -856,7 +809,6 @@ watchmedo = ["PyYAML (>=3.10)", "argh (>=0.24.1)"]
 name = "zipp"
 version = "3.4.1"
 description = "Backport of pathlib-compatible object wrapper for zip files"
-category = "dev"
 optional = false
 python-versions = ">=3.6"
 files = [
@@ -871,4 +823,4 @@ testing = ["func-timeout", "jaraco.itertools", "pytest (>=4.6)", "pytest-black (
 [metadata]
 lock-version = "2.0"
 python-versions = "^3.8"
-content-hash = "fb768e50d9099ebd89fe92b2130d210754a299279bd85b517998826fcc0eb3a7"
+content-hash = "225c716d9f19d31a1d7baea40e294571c43d27bad46e0b1a646491af3ab7e860"
diff --git a/pyproject.toml b/pyproject.toml
index 60718cd..4fdeb72 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -15,7 +15,7 @@ black = "^21.7b0"
 mkdocs = "^1.4.3"
 mkdocs-material = "^7.3.6"
 mdx-truly-sane-lists = "^1.3"
-GitPython = "^3.1.30"
+GitPython = "^3.1.32"
 mike = "^1.1.2"
 pep8-naming = "^0.12.1"
 invoke = "^1.5.0"