Migrate to GitHub Actions (#41)

* Migrate to GitHub Actions and update installation instructions.

Author: thomashoneyman

.github/workflows/ci.yml

@@ -0,0 +1,29 @@
+name: CI
+
+on: push
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v2
+
+      - uses: purescript-contrib/setup-purescript@main
+
+      - uses: actions/setup-node@v1
+        with:
+          node-version: "10"
+
+      - name: Install dependencies
+        run: |
+          npm install -g bower
+          npm install
+          bower install --production
+
+      - name: Build source
+        run: npm run-script build
+
+      - name: Run tests
+        run: |
+          bower install
+          npm run-script test --if-present

.gitignore

@@ -1,7 +1,7 @@
 /.*
 !/.gitignore
 !/.eslintrc.json
-!/.travis.yml
+!/.github/
 package-lock.json
 /bower_components/
 /node_modules/

.travis.yml

@@ -1,14 +1,15 @@
 # purescript-web-html
 
 [![Latest release](http://img.shields.io/github/release/purescript-web/purescript-web-html.svg)](https://github.com/purescript-web/purescript-web-html/releases)
-[![Build status](https://travis-ci.org/purescript-web/purescript-web-html.svg?branch=master)](https://travis-ci.org/purescript-web/purescript-web-html)
+[![Build status](https://github.com/purescript/purescript-web-html/workflows/CI/badge.svg?branch=master)](https://github.com/purescript/purescript-web-html/actions?query=workflow%3ACI+branch%3Amaster)
+[![Pursuit](https://pursuit.purescript.org/packages/purescript-web-html/badge)](https://pursuit.purescript.org/packages/purescript-web-html)
 
 Type definitions and low level interface implementations for the [WHATWG HTML Standard](https://html.spec.whatwg.org).
 
 ## Installation
 
 ```
-bower install purescript-web-html
+spago install web-html
 ```
 
 ## Documentation