feat: replace Travis-CI with GitHub Actions (#77)

* feat: Switch to GitHub Actions

* chore: Remove Travis as CI

* chore: Run it on any push or PR

* fix: Wrap node versions in strings

.github/workflows/ci.yml

@@ -0,0 +1,33 @@
+name: CI
+on: [pull_request, push]
+env:
+  CI: true
+
+jobs:
+  test:
+    name: Tests for Node ${{ matrix.node }} on ${{ matrix.os }}
+    runs-on: ${{ matrix.os }}
+
+    strategy:
+      fail-fast: false
+      matrix:
+        node: ["0.10", "0.12", "4", "6", "8", "10", "12", "14", "16", "18"]
+        os: [ubuntu-latest, windows-latest, macos-latest]
+
+    steps:
+      - name: Clone repository
+        uses: actions/checkout@v3
+
+      - name: Set Node.js version
+        uses: actions/setup-node@v3
+        with:
+          node-version: ${{ matrix.node }}
+
+      - run: node --version
+      - run: npm --version
+
+      - name: Install npm dependencies
+        run: npm install
+
+      - name: Run tests
+        run: npm test

README.md

@@ -1,4 +1,4 @@
-# convert-source-map [![build status](https://secure.travis-ci.org/thlorenz/convert-source-map.svg?branch=master)](http://travis-ci.org/thlorenz/convert-source-map)
+# convert-source-map [![Build Status][ci-image]][ci-url]
 
 Converts a source-map from/to  different formats and allows adding/changing properties.
 
@@ -118,3 +118,6 @@ Returns a comment that links to an external source map via `file`.
 By default, the comment is formatted like: `//# sourceMappingURL=...`, which you would normally see in a JS source file.
 
 When `options.multiline == true`, the comment is formatted like: `/*# sourceMappingURL=... */`, which you would find in a CSS source file.
+
+[ci-url]: https://github.com/gulpjs/vinyl-sourcemap/actions?query=workflow:ci
+[ci-image]: https://img.shields.io/github/workflow/status/gulpjs/vinyl-sourcemap/ci?style=flat-square