Switch from Travis to GitHub actions for CI (#208)

.github/workflows/test.yml

@@ -0,0 +1,32 @@
+name: Test
+
+on:
+  push:
+    branches:
+      - develop
+  pull_request:
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+
+    strategy:
+      matrix:
+        node_version: [10, 12, 14, 16, 18]
+
+    steps:
+    - uses: actions/checkout@v3
+    - name: Use Node.js ${{ matrix.node_version }}
+      uses: actions/setup-node@v3
+      with:
+        node-version: ${{ matrix.node_version }}
+
+    - run: npm ci
+
+    - run: npm run build
+    - run: npm run test
+
+    - if: matrix.node_version == 18
+      uses: codecov/codecov-action@v3
+      with:
+        directory: ./coverage

README.md

@@ -1,4 +1,4 @@
-[![Financial Contributors on Open Collective](https://opencollective.com/webpack-merge/all/badge.svg?label=financial+contributors)](https://opencollective.com/webpack-merge) [![build status](https://secure.travis-ci.org/survivejs/webpack-merge.svg)](http://travis-ci.org/survivejs/webpack-merge) [![codecov](https://codecov.io/gh/survivejs/webpack-merge/branch/master/graph/badge.svg)](https://codecov.io/gh/survivejs/webpack-merge)
+[![Financial Contributors on Open Collective](https://opencollective.com/webpack-merge/all/badge.svg?label=financial+contributors)](https://opencollective.com/webpack-merge) [![Test](https://github.com/survivejs/webpack-merge/actions/workflows/test.yml/badge.svg?branch=develop&event=push)](https://github.com/survivejs/webpack-merge/actions/workflows/test.yml) [![codecov](https://codecov.io/gh/survivejs/webpack-merge/branch/master/graph/badge.svg)](https://codecov.io/gh/survivejs/webpack-merge)
 
 # webpack-merge - Merge designed for Webpack