chore(releasing): Added commitizen for formatted git commit

Added commitizen for using the cz-conventional-changelog conventions. That way, the semantic release
can base on that to determine the version

Author: vogelino

.travis.yml

@@ -16,6 +16,8 @@ before_install:
   - npm i -g npm@^2.0.0
 before_script:
   - npm prune
+script:
+  - npm run test
 after_success:
   - 'curl -Lo travis_after_all.py https://git.io/travis_after_all'
   - python travis_after_all.py

package.json

@@ -5,6 +5,7 @@
   "name": "extendscriptr",
   "description": "A node build configuration to develop extendScripts with es2015 javascript code",
   "scripts": {
+    "commit": "git-cz",
     "clean:temp": "rm -rf ./.tmp ; mkdir ./.tmp",
     "clean:dist": "rm -rf ./test/dist ; mkdir ./test/dist",
     "compile:test:illustrator": "node ./index.js -s test/src/illustrator.js -o test/dist/illustrator.js -t 'illustrator'",
@@ -51,6 +52,13 @@
     "prependify": "^1.2.0"
   },
   "devDependencies": {
+    "commitizen": "^2.8.1",
+    "cz-conventional-changelog": "^1.1.6",
     "semantic-release": "^4.3.5"
+  },
+  "config": {
+    "commitizen": {
+      "path": "./node_modules/cz-conventional-changelog"
+    }
   }
 }