module: add experimental python 3.6 support

.travis.yml

@@ -3,6 +3,12 @@ sudo: false
 language: python
 python:
   - "2.7"
+  - "3.6"
+
+matrix:
+  fast_finish: true
+  allow_failures:
+    - python: "3.6"
 
 script:
   - pylint veml6070