Migrate from Travis to GitHub Actions

I removed the Travis badge instead of replacing it with a GitHub Actions
one because it doesn't seem very necessary to me, as you can see whether
a commit has failing checks directly in the GitHub UI.

.github/workflows/ci.yml

@@ -0,0 +1,26 @@
+name: CI
+
+on:
+  push:
+    branches: [master]
+  pull_request:
+    branches: [master]
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v3
+
+      - uses: actions/setup-node@v3
+        with:
+          node-version: "lts/*"
+
+      - name: Install dependencies
+        run: npm ci
+
+      - name: Build Insect
+        run: npm run build
+
+      - name: Run tests
+        run: npm test

.npmignore

@@ -1,6 +1,6 @@
+/.github/
 /.psci*
 /.pulp-cache
-/.travis.yml
 /binaries
 /bower_components/
 /build.sh

README.md

@@ -459,9 +459,6 @@ For Android, install [Termux](https://termux.com/) from [F-Droid](https://f-droi
 
 ## Development
 
-[![Build
-Status](https://api.travis-ci.org/sharkdp/insect.svg?branch=master)](https://travis-ci.org/sharkdp/insect)
-
 Insect is written in PureScript (see [Getting
 Started](https://github.com/purescript/documentation/blob/master/guides/Getting-Started.md)
 guide). You can install all dependencies and build the whole project by

docs/development.md

@@ -1,8 +1,6 @@
 Development
 -----------
 
-[![Build Status](https://api.travis-ci.org/sharkdp/insect.svg?branch=master)](https://travis-ci.org/sharkdp/insect)
-
 Insect is written in PureScript (see [Getting Started](https://github.com/purescript/documentation/blob/master/guides/Getting-Started.md) guide). You can install all dependencies and build the whole project by running:
 
     npm install