Add a few more pre-commit checks

.pre-commit-config.yaml

@@ -16,4 +16,12 @@ repos:
     hooks:
     -   id: flake8
         additional_dependencies: ['flake8-coding==1.3.1', 'flake8-copyright==0.2.2', 'flake8-debugger==3.1.0', 'flake8-mypy==17.8.0']
+-   repo: https://github.com/pre-commit/pre-commit-hooks
+    rev: v1.2.3
+    hooks:
+    -   id: trailing-whitespace
+    -   id: check-yaml
+    -   id: mixed-line-ending
+    -   id: name-tests-test
+        args: ['--django']
 python_version: python3.6