move isort configs to pyproject.toml

Author: marco-neumann-by

.isort.cfg

@@ -4,6 +4,13 @@ requires = [
 ]
 build-backend = "poetry.masonry.api"
 
+[tool.isort]
+multi_line_output = 3
+include_trailing_comma = true
+force_grid_wrap = 0
+use_parentheses = true
+line_length = 88
+
 [tool.poetry]
 name = "rle-array"
 description = "Run-length encoded pandas."