chore(package): add conventional changelog

Author: Scrum

package.json

@@ -8,6 +8,8 @@
     "dist/"
   ],
   "scripts": {
+    "commitmsg": "conventional-changelog-lint -e",
+    "postpublish": "conventional-changelog -i changelog.md -s -r 0 && git commit -am \"chore(changelog): Update changelog v`npm view post-config version`\"",
     "test": "gulp test",
     "build": "gulp",
     "deploy": "gulp deploy",
@@ -36,6 +38,8 @@
   "devDependencies": {
     "babel-preset-es2015-node6": "^0.4.0",
     "babel-register": "^6.18.0",
+    "conventional-changelog-cli": "^1.2.0",
+    "conventional-changelog-lint": "^1.1.0",
     "doiuse": "^2.5.0",
     "execa": "^0.6.0",
     "gulp": "github:gulpjs/gulp#4.0",
@@ -44,6 +48,7 @@
     "gulp-gh-pages": "^0.5.4",
     "gulp-postcss": "^6.2.0",
     "gulp-rename": "^1.2.2",
+    "husky": "^0.12.0",
     "postcss-at-rules-variables": "0.0.26",
     "postcss-attribute-selector-prefix": "0.0.11",
     "postcss-banner": "^3.0.0",