workaround ConfigParser bug

Author: gaborbernat

.pre-commit-config.yaml

@@ -11,8 +11,8 @@ repos:
     -   id: blacken-docs
         additional_dependencies: [black==18.9b0]
         language_version: python3.7
--   repo: https://github.com/asottile/seed-isort-config
-    rev: v1.2.0
+-   repo: https://github.com/gaborbernat/seed-isort-config
+    rev: master
     hooks:
     -   id: seed-isort-config
         args: [--application-directories, "src:tests:virtualenv_embedded"]

tox.ini

@@ -105,6 +105,7 @@ multi_line_output = 3
 include_trailing_comma = True
 force_grid_wrap = 0
 line_length = 120
+known_standard_library = ConfigParser
 known_first_party = virtualenv
 known_third_party = __builtin__,_winreg,mock,pytest,sets,setuptools,sitecustomize,sphinx_rtd_theme,urlparse,usercustomize,winreg