Setup GitHub Workflow for testing

Author: piecioshka

.github/FUNDING.yml

@@ -0,0 +1,8 @@
+# These are supported funding model platforms
+
+github: # Replace with up to 4 GitHub Sponsors-enabled usernames e.g., [user1, user2]
+patreon: # Replace with a single Patreon username
+open_collective: # Replace with a single Open Collective username
+ko_fi: # Replace with a single Ko-fi username
+tidelift: # Replace with a single Tidelift platform-name/package-name e.g., npm/babel
+custom: https://patronite.pl/piecioshka

.github/workflows/testing.yml

@@ -0,0 +1,33 @@
+# This workflow will do a clean installation of node dependencies, cache/restore them, build the source code and run tests across different versions of node
+# For more information see: https://docs.github.com/en/actions/automating-builds-and-tests/building-and-testing-nodejs
+
+name: Testing
+
+on:
+  push:
+    branches: [ "master" ]
+  pull_request:
+    branches: [ "master" ]
+
+jobs:
+  build:
+
+    runs-on: ubuntu-latest
+
+    strategy:
+      matrix:
+        node-version: [16.x, 20.x]
+
+    steps:
+    - uses: actions/checkout@v3
+    - name: Use Node.js ${{ matrix.node-version }}
+      uses: actions/setup-node@v3
+      with:
+        node-version: ${{ matrix.node-version }}
+        cache: 'npm'
+    - run: npm ci
+    - run: npm run build --if-present
+    - run: npm test
+    - run: npm run e2e --if-present
+      env:
+        CI: true

README.md

@@ -4,6 +4,7 @@
 [![npm version](https://badge.fury.io/js/xpath-to-css-template-string-tag.svg)](https://badge.fury.io/js/xpath-to-css-template-string-tag)
 [![downloads count](https://img.shields.io/npm/dt/xpath-to-css-template-string-tag.svg)](https://www.npmjs.com/package/xpath-to-css-template-string-tag)
 [![license](https://img.shields.io/npm/l/xpath-to-css-template-string-tag.svg)](https://piecioshka.mit-license.org)
+[![github-ci](https://github.com/piecioshka/xpath-to-css-template-string-tag/actions/workflows/testing.yml/badge.svg)](https://github.com/piecioshka/xpath-to-css-template-string-tag/actions/workflows/testing.yml)
 
 🔨 Convert XPath to Selector as [Tagged template literal](https://exploringjs.com/es6/ch_template-literals.html#_tagged-template-literals)