chore: lint commit messages (#12)

Author: JamesHenry

.travis.yml

@@ -13,6 +13,7 @@ node_js:
 install:
   - yarn --ignore-engines
 script:
+  - commitlint-travis
   - yarn test
 after_success:
   - npm run travis-deploy-once "npm run semantic-release"

README.md

@@ -1,6 +1,17 @@
-# TypeScript ESTree
+<h1 align="center">TypeScript ESTree</h1>
 
-A parser that converts TypeScript source code into an [ESTree](https://github.com/estree/estree)-compatible form.
+<p align="center">A parser that converts TypeScript source code into an ESTree-compatible form: https://github.com/estree/estree</p>
+
+<p align="center">
+    <a href="https://travis-ci.org/JamesHenry/typescript-estree"><img src="https://img.shields.io/travis/JamesHenry/typescript-estree.svg?style=flat-square" alt="Travis"/></a>
+    <a href="https://github.com/JamesHenry/typescript-estree/blob/master/LICENSE"><img src="https://img.shields.io/npm/l/typescript-estree.svg?style=flat-square" alt="GitHub license" /></a>
+    <a href="https://www.npmjs.com/package/typescript-estree"><img src="https://img.shields.io/npm/v/typescript-estree.svg?style=flat-square" alt="NPM Version" /></a>
+    <a href="https://www.npmjs.com/package/typescript-estree"><img src="https://img.shields.io/npm/dt/typescript-estree.svg?style=flat-square" alt="NPM Downloads" /></a>
+    <a href="http://commitizen.github.io/cz-cli/"><img src="https://img.shields.io/badge/commitizen-friendly-brightgreen.svg" alt="Commitizen friendly" /></a>
+    <a href="https://github.com/semantic-release/semantic-release"><img src="https://img.shields.io/badge/%20%20%F0%9F%93%A6%F0%9F%9A%80-semantic--release-e10079.svg?style=flat-square" alt="semantic-release" /></a>
+</p>
+
+<br>
 
 ## Usage
 

package.json

@@ -17,6 +17,9 @@
   },
   "license": "BSD-2-Clause",
   "devDependencies": {
+    "@commitlint/cli": "^7.1.2",
+    "@commitlint/config-conventional": "^7.1.2",
+    "@commitlint/travis-cli": "^7.1.2",
     "babel-code-frame": "6.26.0",
     "babylon": "7.0.0-beta.39",
     "cz-conventional-changelog": "2.1.0",
@@ -27,8 +30,8 @@
     "lodash.isplainobject": "4.0.6",
     "semantic-release": "^15.9.16",
     "shelljs": "0.8.2",
-    "typescript": "~3.0.1",
-    "travis-deploy-once": "^5.0.8"
+    "travis-deploy-once": "^5.0.8",
+    "typescript": "~3.0.1"
   },
   "keywords": [
     "ast",
@@ -45,6 +48,7 @@
     "ast-alignment-tests": "jest --config=./tests/ast-alignment/jest.config.js",
     "precommit": "npm test && lint-staged",
     "cz": "git-cz",
+    "commitmsg": "commitlint -E GIT_PARAMS",
     "semantic-release": "semantic-release",
     "travis-deploy-once": "travis-deploy-once"
   },
@@ -61,6 +65,9 @@
       "path": "./node_modules/cz-conventional-changelog"
     }
   },
+  "commitlint": {
+    "extends": ["@commitlint/config-conventional"]
+  },
   "jest": {
     "testEnvironment": "node",
     "testRegex": "tests/lib/.+\\.js$",