Dropping support for python 3.4

Author: ssomnath

.travis.yml

@@ -4,7 +4,6 @@ python:
   - '3.8'
   - '3.6'
   - '3.5'
-  - '3.4'
 before_install:
   - sudo apt-get update -qq
   - pip  install coveralls

setup.py

@@ -51,7 +51,6 @@
         'Operating System :: OS Independent',
         'Programming Language :: Cython',
         'Programming Language :: Python :: 3',
-        'Programming Language :: Python :: 3.4',
         'Programming Language :: Python :: 3.5',
         'Programming Language :: Python :: 3.6',
         'Programming Language :: Python :: 3.7',