Disable CI on macOS/Python3.5 (TLSv1.2 required by pip is not available)

Author: touilleMan

.travis.yml

@@ -13,9 +13,11 @@ matrix:
   - os: linux
     language: generic
     env: USE_PYPY_RELEASE_VERSION=5.9-beta
-  - os: osx
-    language: generic
-    env: MACPYTHON=3.5.4
+  # Python3.5 on MacOS doesn't currently support TLSv1.2 needed to use pip :(
+  # http://pyfound.blogspot.fr/2017/01/time-to-upgrade-your-python-tls-v12.html
+  # - os: osx
+  #   language: generic
+  #   env: MACPYTHON=3.5.4
   - os: osx
     language: generic
     env: MACPYTHON=3.6.3