remove python3.3 from testing

.travis.yml

@@ -9,8 +9,6 @@ matrix:
       env: TOXENV=py3flake8
     - python: 2.7
       env: TOXENV=py27
-    - python: 3.3
-      env: TOXENV=py33
     - python: 3.4
       env: TOXENV=py34
     - python: 3.5

README.md

@@ -15,14 +15,15 @@ pip install logzio-python-handler
 
 ## Tested Python Versions
 Travis CI will build this handler and test against:
-  - "2.7"
-  - "3.3"
+  - "2.7" 
   - "3.4"
   - "3.5"
   - "3.6"
 
 We can't ensure compatibility to any other version, as we can't test it automatically.
 
+**Note**: The Logz.io Python Handler no longer tests Python 3.3 (which was [end-of-lifed](https://www.python.org/dev/peps/pep-0398/#id11) in 2017).
+
 To run tests:
 
 ```bash

tox.ini

@@ -1,6 +1,6 @@
 [tox]
 minversion = 1.7.2
-envlist = flake8, py3flake8, py27, py33, py34, py35, py36
+envlist = flake8, py3flake8, py27, py34, py35, py36
 skip_missing_interpreters = true
 
 [testenv]