Document support for Python 3.7

Author: michael-k

.travis.yml

@@ -4,14 +4,14 @@ python:
   - "3.4"
   - "3.5"
   - "3.6"
-  - "3.6-dev"
-  - "3.7-dev"
   - "nightly"
   # - "pypy" - won't work as smmap doesn't work (see gitdb/.travis.yml for details)
 matrix:
+  include:
+    - python: 3.7
+      dist: xenial
+      sudo: required
   allow_failures:
-    - python: "3.6-dev"
-    - python: "3.7-dev"
     - python: "nightly"
 git:
   # a higher depth is needed for most of the tests - must be high enough to not actually be shallow

README.md

@@ -19,7 +19,7 @@ If it is not in your `PATH`, you can help GitPython find it by setting
 the `GIT_PYTHON_GIT_EXECUTABLE=<path/to/git>` environment variable.
 
 * Git (1.7.x or newer)
-* Python 2.7 to 3.6.
+* Python 2.7 to 3.7.
 
 The list of dependencies are listed in `./requirements.txt` and `./test-requirements.txt`.
 The installer takes care of installing them for you.

setup.py

@@ -110,5 +110,6 @@ def _stamp_version(filename):
         "Programming Language :: Python :: 3.4",
         "Programming Language :: Python :: 3.5",
         "Programming Language :: Python :: 3.6",
+        "Programming Language :: Python :: 3.7",
     ]
 )

tox.ini

@@ -1,5 +1,5 @@
 [tox]
-envlist = py27,py34,py35,py36,flake8
+envlist = py27,py34,py35,py36,py37,flake8
 
 [testenv]
 commands = nosetests {posargs}