Fix pyproject.toml support

Parse pyproject.toml using a TOML parser (pytoml), not configparser.
Installing pytoml is optional through the extra 'pyproject'. Handles
TOML quoting and types.

Refs #790
Refs #760
Fixes #763

1 files changed, 1 insertions, 0 deletions

diff --git a/tox.ini b/tox.ini
index c2558e4e..0e5b1db9 100644
--- a/tox.ini
+++ b/tox.ini
@@ -10,6 +10,7 @@ deps =
     pytest
 extras =
     pipfile
+    pyproject
     requirements
 commands = py.test test_isort.py {posargs}