chore(linting): add commitlint prompt and hook (#23)

setup the repository to conform to the Conventional Commits guidelines. Includes contribution documentation. NOTE: There is currently a bug in the footer-leading-blank rule that does not properly detect leading blank lines (https://github.com/marionebl/commitlint/issues/292)

closes #12

CONTRIBUTING.md

@@ -0,0 +1,9 @@
+# Contributing to Angular Redux
+
+## Package Management
+
+This repo utilizes [Yarn Workspaces](https://yarnpkg.com/lang/en/docs/workspaces/) for package management. Please install and use [Yarn](https://yarnpkg.com/en/docs/getting-started) as your npm client for this project. The npm cli is not supported for package installation.
+
+## Commit Message Guidelines
+
+We follow the [Conventional Commits](https://conventionalcommits.org/) guidelines. These are enforced through the use of [commitlint](http://marionebl.github.io/commitlint). If you would like a more interactive way of formatting your commit messages, run `yarn commit` once your changes are staged.

commitlint.config.js

@@ -0,0 +1,3 @@
+module.exports = {
+  extends: ['@commitlint/config-conventional'],
+};

package.json

@@ -4,10 +4,16 @@
     "packages/*"
   ],
   "scripts": {
-		"build": "lerna run build",
-		"lint": "lerna run lint"
+    "build": "lerna run build",
+    "lint": "lerna run lint",
+    "commit": "commit",
+    "commitmsg": "commitlint -E GIT_PARAMS"
   },
   "devDependencies": {
+    "@commitlint/cli": "^7.0.0",
+    "@commitlint/config-conventional": "^7.0.1",
+    "@commitlint/prompt-cli": "^7.0.0",
+    "husky": "^0.14.3",
     "lerna": "2.11.0"
   }
 }