Allow failure of python 2.6

Byron · Byron · commit 92c7c8eba972 · 2017-06-10T17:57:45.000+02:00
It really is not supported anymore by anyone, so it seems.
diff --git a/.travis.yml b/.travis.yml
@@ -12,6 +12,7 @@ python:
   # - "pypy" - won't work as smmap doesn't work (see gitdb/.travis.yml for details)
 matrix:
   allow_failures:
+    - python: "2.6"
     - python: "3.6-dev"
     - python: "3.7-dev"
     - python: "nightly"
