Add flake8 and bump pre-commit versions

Author: daisylb

.pre-commit-config.yaml

@@ -1,6 +1,6 @@
 repos:
 -   repo: https://github.com/pre-commit/pre-commit-hooks
-    rev: v1.4.0
+    rev: v2.0.0
     hooks:
     -   id: check-added-large-files
         exclude: partsapp\/static\/highcharts\/highcharts\.src\.js$
@@ -10,9 +10,10 @@ repos:
     -   id: end-of-file-fixer
     -   id: trailing-whitespace
     -   id: requirements-txt-fixer
+    -   id: flake8
         exclude: migrations\/[^/]*\.py$|settings\/[^/]*\.py|highcharts\/$|docs\/conf\.py
 -   repo: https://github.com/Lucas-C/pre-commit-hooks
-    rev: v1.1.5
+    rev: v1.1.6
     hooks:
     -   id: forbid-crlf
         exclude: \.csv$|\.png$|\.bat$
@@ -24,14 +25,11 @@ repos:
     -   id: python-import-sorter
         exclude: migrations\/[^/]*\.py$|docs\/conf\.py
 -   repo: https://github.com/prettier/prettier
-    rev: 1.14.0
+    rev: 1.14.2
     hooks:
     -   id: prettier
-        types: [file]
-        files: \.(css|less|scss|ts|tsx|graphql|gql|json|js|jsx)$
-        exclude: \.min\.(js|css)$|^parts/apps/partsapp/static/highcharts
 -   repo: https://github.com/ambv/black
-    rev: stable
+    rev: 18.9b0
     hooks:
     - id: black
       language_version: python3.7

tox.ini

@@ -24,3 +24,6 @@ addopts=--reuse-db
 testpaths=django_pgtree
 python_files=*_tests.py tests.py
 python_paths=testproject/
+
+[flake8]
+max_line_length = 88