Bump Python version to 3.5 to support typing

.gitlab-ci.yml

-image: python:3.4
+image: python:3.5
 
 before_script:
   - python -V
   - pip install -e .
-  
+
 variables:
   PIP_CACHE_DIR: "$CI_PROJECT_DIR/pip-cache"
 

bin/hektor

@@ -5,6 +5,6 @@ import sys
 import hektor
 
 if __name__ == '__main__':
-    if sys.version_info < (3, 4):
+    if sys.version_info < (3, 5):
         sys.exit("At least Python 3.4 is required.")
     hektor.main()