Use GitHub Actions instead (#7)

.github/workflows/test.yml

@@ -0,0 +1,46 @@
+name: test
+
+on:
+  push:
+    branches:
+      - master
+  pull_request:
+    branches:
+      - master
+
+jobs:
+  linux:
+    runs-on: ubuntu-latest
+
+    strategy:
+      matrix:
+        node-version: [10.x, 12.x, 14.x]
+
+    steps:
+    - uses: actions/checkout@v2
+    - name: Use Node.js ${{ matrix.node-version }}
+      uses: actions/setup-node@v1
+      with:
+        node-version: ${{ matrix.node-version }}
+    - run: npm install
+    - run: npm test
+      env:
+        CI: true
+
+  macos:
+    runs-on: macos-latest
+
+    strategy:
+      matrix:
+        node-version: [10.x, 12.x, 14.x]
+
+    steps:
+    - uses: actions/checkout@v2
+    - name: Use Node.js ${{ matrix.node-version }}
+      uses: actions/setup-node@v1
+      with:
+        node-version: ${{ matrix.node-version }}
+    - run: npm install
+    - run: npm test
+      env:
+        CI: true

readme.md

@@ -1,4 +1,4 @@
-# pngout-bin [![Build Status](http://img.shields.io/travis/imagemin/pngout-bin.svg?style=flat)](https://travis-ci.org/imagemin/pngout-bin)
+# pngout-bin ![GitHub Actions Status](https://github.com/imagemin/pngout-bin/workflows/test/badge.svg?branch=master)
 
 > [pngout](http://advsys.net/ken/util/pngout.htm) optimizes the size of PNG files losslessly