Merge pull request #8 from thesis/v0.3.0

This version includes backported rules from across Thesis projects, including...

* Allowing the use of `_` as a throwaway positional argument name, and...
* Erroring on unused variables in Typescript

... as well as improved documentation!

package.json

@@ -1,6 +1,6 @@
 {
   "name": "@thesis-co/eslint-config",
-  "version": "0.2.0",
+  "version": "0.3.0",
   "description": "ESLint TypeScript shareable config for Thesis wide projects",
   "main": "index.js",
   "repository": "[email protected]:thesis/eslint-config.git",