chore: remove 0.12 from test matrix

Author: lewiscowper

.travis.yml

@@ -6,11 +6,11 @@ language: node_js
 notifications:
   email: false
 node_js:
+  - 5
   - 4
   # - iojs-v3
   # - iojs-v2
   # - iojs-v1
-  - '0.12'
   - '0.10'
 before_install:
   - npm i -g npm@^2.0.0