Remove Python 3.4 from supported languages

Author: danni

.travis.yml

@@ -2,7 +2,6 @@ sudo: false
 language: python
 
 python:
-    - '3.4'
     - '3.5'
     - '3.6'
     - '3.7'

setup.py

@@ -39,9 +39,10 @@
                 'License :: OSI Approved :: MIT License',
                 'Programming Language :: Python',
                 'Programming Language :: Python :: 3',
-                'Programming Language :: Python :: 3.4',
                 'Programming Language :: Python :: 3.5',
                 'Programming Language :: Python :: 3.6',
+                'Programming Language :: Python :: 3.7',
+                'Programming Language :: Python :: 3.8',
                 'Topic :: Security :: Cryptography',
             ],