chore: make repo "commitizen friendly"

Closes #74

README.md

@@ -5,6 +5,7 @@
 [![Join the chat at https://gitter.im/semantic-release/semantic-release](https://badges.gitter.im/Join%20Chat.svg)](https://gitter.im/semantic-release/semantic-release?utm_source=badge&utm_medium=badge&utm_campaign=pr-badge&utm_content=badge)
 [![semantic-release](https://img.shields.io/badge/%20%20%F0%9F%93%A6%F0%9F%9A%80-semantic--release-e10079.svg)](https://github.com/semantic-release/semantic-release)
 [![js-standard-style](https://img.shields.io/badge/code%20style-standard-brightgreen.svg?style=flat)](https://github.com/feross/standard)
+[![Commitizen friendly](https://img.shields.io/badge/commitizen-friendly-brightgreen.svg)](http://commitizen.github.io/cz-cli/)
 
 [![Dependency Status](https://david-dm.org/semantic-release/semantic-release/badger.svg)](https://david-dm.org/semantic-release/semantic-release/badger)
 [![devDependency Status](https://david-dm.org/semantic-release/semantic-release/badger/dev-status.svg)](https://david-dm.org/semantic-release/semantic-release/badger#info=devDependencies)

package.json

@@ -8,10 +8,6 @@
   "bugs": {
     "url": "https://github.com/semantic-release/semantic-release/issues"
   },
-  "engines": {
-    "node": ">=0.10",
-    "npm": ">=2"
-  },
   "config": {
     "nyc": {
       "exclude": [
@@ -20,6 +16,9 @@
       ]
     }
   },
+  "czConfig": {
+    "path": "node_modules/cz-conventional-changelog/"
+  },
   "dependencies": {
     "@semantic-release/commit-analyzer": "^2.0.0",
     "@semantic-release/condition-travis": "^4.1.2",
@@ -42,6 +41,7 @@
   "devDependencies": {
     "babel": "^5.5.8",
     "coveralls": "^2.11.2",
+    "cz-conventional-changelog": "^1.1.0",
     "mkdirp": "^0.5.1",
     "nixt": "^0.4.1",
     "nock": "^2.5.0",
@@ -52,6 +52,10 @@
     "standard": "^5.0.2",
     "tap": "^1.3.1"
   },
+  "engines": {
+    "node": ">=0.10",
+    "npm": ">=2"
+  },
   "homepage": "https://github.com/semantic-release/semantic-release/tree/next#readme",
   "keywords": [
     "author",