Replace TravisCI with GHA

Signed-off-by: Matthew Peveler <matt.peveler@gmail.com>

.github/workflows/ci.yml

@@ -0,0 +1,40 @@
+name: CI
+
+on:
+  push:
+    branches:
+      - master
+  pull_request:
+      branches:
+        - master
+
+jobs:
+  ci:
+    runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        node-version: [12.x, 14.x, 16.x, 18.x, 20.x, 22.x]
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v4
+
+      - name: Set up Node ${{ matrix.node-version }}
+        uses: actions/setup-node@v4
+        with:
+          node-version: ${{ matrix.node-version }}
+
+      - name: Install dependencies
+        run: npm ci
+        if: matrix.node-version != '6.x'
+
+      - name: Install dependencies for Node 6.x
+        run: npm install
+        if: matrix.node-version == '6.x'
+
+      - name: Build
+        run: npm run build
+
+      - name: Run tests
+        run: npm test
+
+

.travis.yml

@@ -1,10 +0,0 @@
-language: node_js
-node_js:
-  - "6.11.4"
-  - "8.6.0"
-before_install:
-  - npm install coveralls
-after_success: npm run coveralls
-branches:
-  only:
-    - master

README.md

@@ -1,5 +1,5 @@
 # js-sha256
-[![Build Status](https://travis-ci.org/emn178/js-sha256.svg?branch=master)](https://travis-ci.org/emn178/js-sha256)
+[![CI](https://github.com/emn178/js-sha256/actions/workflows/ci.yml/badge.svg)](https://github.com/emn178/js-sha256/actions/workflows/ci.yml)
 [![Coverage Status](https://coveralls.io/repos/emn178/js-sha256/badge.svg?branch=master)](https://coveralls.io/r/emn178/js-sha256?branch=master)
 [![CDNJS](https://img.shields.io/cdnjs/v/js-sha256.svg)](https://cdnjs.com/libraries/js-sha256/)  
 [![NPM](https://nodei.co/npm/js-sha256.png?stars&downloads)](https://nodei.co/npm/js-sha256/)