adjust srcContext, add coveralls hook

.travis.yml

@@ -6,3 +6,5 @@ node_js:
   - "4.2"
   - "4.1"
   - "4.0"
+after_success:
+  - coveralls

test/unit/index.js

@@ -9,5 +9,4 @@ testsContext.keys().forEach(testsContext)
 // require all src files except main.js for coverage.
 // you can also change this to match only the subset of files that
 // you want coverage for.
-var srcContext = require.context('../../src', true, /^\.\/(?!main(\.js)?$)/)
-srcContext.keys().forEach(srcContext)
+var srcContext = require('../../src/components/Select.vue')