Added basic pre-commit config and added pre-commit to requirements_dev

Author: s-weigand

.pre-commit-config.yaml

@@ -0,0 +1,12 @@
+repos:
+  - repo: https://github.com/pre-commit/pre-commit-hooks
+    rev: v3.1.0
+    hooks:
+      - id: check-ast
+      - id: check-builtin-literals
+      - id: check-merge-conflict
+      - id: end-of-file-fixer
+      - id: trailing-whitespace
+      - id: debug-statements
+      - id: fix-encoding-pragma
+        args: [--remove]

requirements_dev.txt

@@ -31,9 +31,12 @@ IPython>=7.2.0
 
 # testing dependencies
 tox>=3.0.0
-flake8>=3.5.0
 pytest>=3.7.1
 pluggy>=0.7
 pytest-cov>=2.5.1
 pytest-runner>=2.11.1
 pytest-benchmark>=3.1.1
+
+# code quality asurence
+flake8>=3.8.3
+pre-commit>=2.6.0