build(travis): Prune dependencies after running script

Author: davesnx

.travis.yml

@@ -21,5 +21,8 @@ before_install:
   - npm set loglevel error
   - npm set progress false
 
+after_script:
+  - npm prune
+
 after_success:
   # - npm run semantic-release || true

package.json

@@ -11,7 +11,6 @@
     "test": "mocha --compilers js:babel-register",
     "test:watch": "npm run test -- --watch",
     "prepublishOnly": "npm run clean && npm run build",
-    "semantic-release": "semantic-release pre && npm publish && semantic-release post",
     "commitmsg": "validate-commit-msg",
     "prepush": "npm test"
   },