feat(package.json): improve release process

Author: llorca

.travis.yml

@@ -9,7 +9,7 @@ node_js:
   - '8'
   - '6'
 after_success:
-  - npm run semantic-release
+  - npm run release
 branches:
   except:
     - /^v\d+\.\d+\.\d+$/

package.json

@@ -14,8 +14,8 @@
     "dev": "webpack-dev-server --open --config webpack.dev.js",
     "test": "echo \"Error: no test specified\" && exit 0",
     "build": "webpack --config webpack.prod.js",
-    "release": "./node_modules/.bin/semantic-release pre && npm publish && ./node_modules/.bin/semantic-release post",
-    "semantic-release": "semantic-release pre && npm publish && semantic-release post"
+    "semantic-release": "./node_modules/.bin/semantic-release",
+    "release": "npm run build && npm run semantic-release pre && npm publish && npm run semantic-release post"
   },
   "repository": {
     "type": "git",