Add requirements

pyproject.toml

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+[tool.isort]
+profile = "black"
+multi_line_output = 3
+
+[tool.black]
+target-version = ['py37']
+
+[tool.pylint.MASTER]
+reports = 'no'
+disable = [
+  "too-many-branches",
+  "missing-function-docstring",
+  "missing-module-docstring",
+  "too-many-statements",
+  "import-outside-toplevel",
+  "line-too-long",
+  "missing-class-docstring",
+  "too-few-public-methods",
+  "too-many-arguments",
+  "too-many-instance-attributes",
+  "too-many-locals",
+  "unused-argument",
+  "cyclic-import",
+]

requirements_test.txt

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+pylint==2.11.1
+black==21.9b0
+flake8==4.0.1
+isort==5.9.3

setup.cfg

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+[flake8]
+max-line-length = 120
+# Following 4 for black compatibility
+# E501: line too long
+# W503: Line break occurred before a binary operator
+# E203: Whitespace before ':'
+# D202 No blank lines allowed after function docstring
+
+ignore =
+    E501,
+    W503,
+    E203,
+    D202,
+