Update CI

Author: vladikoff

Diff for: .github/workflows/test.yml

@@ -0,0 +1,39 @@
+name: Tests
+
+on: [push, pull_request]
+
+env:
+  FORCE_COLOR: 2
+
+jobs:
+  run:
+    name: Node ${{ matrix.node }} on ${{ matrix.os }}
+    runs-on: ${{ matrix.os }}
+
+    strategy:
+      fail-fast: false
+      matrix:
+        node: [12, 14, 16]
+        os: [ubuntu-latest, windows-latest]
+
+    steps:
+      - name: Clone repository
+        uses: actions/checkout@v2
+
+      - name: Set up Node.js
+        uses: actions/setup-node@v2
+        with:
+          node-version: ${{ matrix.node }}
+
+      - name: Install npm dependencies
+        run: npm ci
+
+      - name: Run tests
+        run: npm test
+
+      # We test multiple Windows shells because of prior stdout buffering issues
+      # filed against Grunt. https://github.com/joyent/node/issues/3584
+      - name: Run PowerShell tests
+        run: "npm test # PowerShell" # Pass comment to PS for easier debugging
+        shell: powershell
+        if: startsWith(matrix.os, 'windows')

Diff for: .travis.yml

@@ -1 +1 @@
-Please see the [Contributing to grunt](http://gruntjs.com/contributing) guide for information on contributing to this project.
+Please see the [Contributing to grunt](https://gruntjs.com/contributing) guide for information on contributing to this project.

Diff for: CONTRIBUTING.md

@@ -1,12 +1,12 @@
-# grunt-contrib-concat v1.0.1 [![Build Status: Linux](https://travis-ci.org/gruntjs/grunt-contrib-concat.svg?branch=master)](https://travis-ci.org/gruntjs/grunt-contrib-concat) [![Build Status: Windows](https://ci.appveyor.com/api/projects/status/l42173901ms416km/branch/master?svg=true)](https://ci.appveyor.com/project/gruntjs/grunt-contrib-concat/branch/master)
+# grunt-contrib-concat v1.0.1 [![Build Status](https://github.com/gruntjs/grunt-contrib-concat/workflows/Tests/badge.svg)](https://github.com/gruntjs/grunt-contrib-concat/actions?workflow=Tests)
 
 > Concatenate files.
 
 
 
 ## Getting Started
 
-If you haven't used [Grunt](http://gruntjs.com/) before, be sure to check out the [Getting Started](http://gruntjs.com/getting-started) guide, as it explains how to create a [Gruntfile](http://gruntjs.com/sample-gruntfile) as well as install and use Grunt plugins. Once you're familiar with that process, you may install this plugin with this command:
+If you haven't used [Grunt](https://gruntjs.com/) before, be sure to check out the [Getting Started](https://gruntjs.com/getting-started) guide, as it explains how to create a [Gruntfile](https://gruntjs.com/sample-gruntfile) as well as install and use Grunt plugins. Once you're familiar with that process, you may install this plugin with this command:
 
 ```shell
 npm install grunt-contrib-concat --save-dev
@@ -298,4 +298,4 @@ grunt.initConfig({
 
 Task submitted by ["Cowboy" Ben Alman](http://benalman.com/)
 
-*This file was generated on Wed Apr 20 2016 08:41:44.*
+*This file was generated on Thu Oct 07 2021 23:00:09.*