Update python versions support

Removed Python 2.7 as doit itself not supporting 2.7.
Python 3.3 and 3.4 is EOL (https://devguide.python.org/#status-of-python-branches),
added more recent python versions (3.6, 3.7, 3.8).

Author: winterheart

.travis.yml

@@ -1,9 +1,9 @@
 language: python
 python:
-    - "2.7"
-    - "3.3"
-    - "3.4"
     - "3.5"
+    - "3.6"
+    - "3.7"
+    - "3.8"
 
 sudo: false
 
@@ -25,13 +25,13 @@ branches:
 script:
   - doit
   - py.test
-  - if [[ $TRAVIS_PYTHON_VERSION == '3.5' ]]; then coverage run `which py.test`; fi
+  - coverage run `which py.test`
 
 after_success:
-  - if [[ $TRAVIS_PYTHON_VERSION == '3.5' ]]; then coveralls; fi
+  - coveralls
 
 
 notifications:
-    email:
-        on_success: change
-        on_failure: change
+  email:
+    on_success: change
+    on_failure: change

setup.py

@@ -30,12 +30,11 @@
         'Natural Language :: English',
         'Operating System :: OS Independent',
         'Programming Language :: Python',
-        'Programming Language :: Python :: 2',
-        'Programming Language :: Python :: 2.7',
         'Programming Language :: Python :: 3',
-        'Programming Language :: Python :: 3.3',
-        '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 :: Software Development :: Libraries',
     ]
 )