ci: add ci setup that lints and runs tests (#72)

* ci: add ci setup that lints and runs tests

* docs: fix markdown headers in readme

.github/workflows/test.yml

@@ -0,0 +1,20 @@
+name: Tests
+
+on: [push, pull_request]
+
+jobs:
+  Tests:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v2
+        with:
+          fetch-depth: 0
+      - uses: actions/setup-node@v1
+        with:
+          node-version: '16.x'
+      - name: Install NPM dependencies
+        run: npm ci
+      - name: Lint
+        run: npm run lint
+      - name: Test
+        run: npm run test

README.md

@@ -2,7 +2,7 @@
 
 Alloy specific linting rules for ESLint.
 
-# Installation
+## Installation
 
 Install [ESLint](https://www.github.com/eslint/eslint) either locally or globally.
 
@@ -35,7 +35,7 @@ Enable the rules that you would like to use.
   }
 ```
 
-# List of supported rules
+## List of supported rules
 
 * [alloy/no-unused-vars](docs/rules/no-unused-vars.md): Extension of the built in [no-unused-vars](https://github.com/eslint/eslint/blob/master/docs/rules/no-unused-vars.md) that also looks up functions used in view files.