Use GitHub Actions (#110)

* github action

* update lockfile

* checkout submodules

* new badge and nvmrc

.github/workflows/test.yml

@@ -0,0 +1,29 @@
+name: Run tests
+on: [push]
+env:
+  NODE_VERSION: 20.x
+jobs:
+  tests:
+    runs-on: ubuntu-latest
+
+    permissions:
+      id-token: write
+      contents: read
+
+    steps:
+      - name: checkout commit
+        uses: actions/checkout@v4
+        with:
+          submodules: true
+
+      - name: Use Node.js 20.x
+        uses: actions/setup-node@v4
+        with:
+          node-version: ${{ env.NODE_VERSION }}
+          cache: npm
+
+      - name: install node deps
+        run: npm ci
+
+      - name: run tests
+        run: npm test

.nvmrc

@@ -0,0 +1 @@
+20

README.md

@@ -1,6 +1,6 @@
 ![mvt-fixtures crew](https://c1.staticflickr.com/5/4495/24124229798_b82cd97858_o.png)
 
-[![Build Status](https://travis-ci.org/mapbox/mvt-fixtures.svg?branch=master)](https://travis-ci.org/mapbox/mvt-fixtures)
+[![Run tests](https://github.com/mapbox/mvt-fixtures/actions/workflows/test.yml/badge.svg)](https://github.com/mapbox/mvt-fixtures/actions/workflows/test.yml)
 
 A `require()`able suite of valid and invalid vector tile fixtures for testing [Mapbox Vector Tile](https://github.com/mapbox/vector-tile-spec) encoders and decoders. You can view a list of all fixtures at [FIXTURES.md](FIXTURES.md).