Attempt to make coverage working again.

Author: brammool

.travis.yml

@@ -66,6 +66,7 @@ addons:
 
 before_install:
   - pip install --user cpp-coveralls
+  - pip install --user requests[security]
     # Lua is not installed on Travis OSX
   - if [ "$TRAVIS_OS_NAME" = "osx" ]; then brew install lua; export LUA_PREFIX=/usr/local; fi