Update flake8 and fetch it from GitHub instead of GitLab (#209)

Author: suhaibmujahid

.pre-commit-config.yaml

@@ -16,14 +16,14 @@ repos:
     hooks:
       - id: prettier
         exclude: ^tests/|libmozdata/modules.json
-  - repo: https://gitlab.com/pycqa/flake8
-    rev: 3.9.2
+  - repo: https://github.com/pycqa/flake8
+    rev: 5.0.4
     hooks:
       - id: flake8
         additional_dependencies:
-          - "flake8-coding==1.3.1"
-          - "flake8-copyright==0.2.2"
-          - "flake8-debugger==3.1.0"
+          - "flake8-coding==1.3.2"
+          - "flake8-copyright==0.2.3"
+          - "flake8-debugger==4.1.2"
           - "flake8-mypy==17.8.0"
   - repo: https://github.com/pre-commit/pre-commit-hooks
     rev: v4.1.0