Replace Travis CI builds with github actions

.gitattributes

@@ -1,7 +1,7 @@
 .gitattributes export-ignore
+.github/ export-ignore
 .gitignore export-ignore
 .scrutinizer.yml export-ignore
-.travis.yml export-ignore
 composer.json export-ignore
 phpcs.xml export-ignore
 phpunit.xml.dist export-ignore

.github/workflows/ci_failure_email.md.tmpl

@@ -0,0 +1,3 @@
+CI workflow ${WORKFLOW} failed!
+
+The failed job can be found in [here](${SERVER_URL}/${REPOSITORY}/actions/runs/${RUN_ID}).

.github/workflows/lint-and-test.yaml

@@ -0,0 +1,50 @@
+name: Lint and Test
+on: push
+permissions:
+  contents: read
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        php_version: [ '7.4', '8.0', '8.1', '8.2', '8.3', '8.4' ]
+    steps:
+      - uses: actions/checkout@v4
+      - name: Setup PHP
+        uses: shivammathur/setup-php@v2
+        with:
+          php-version: ${{ matrix.php_version }}
+      - uses: nowactions/envsubst@v1
+        with:
+          input: ${{ github.workspace }}/.github/workflows/ci_failure_email.md.tmpl
+          output: ${{ github.workspace }}/.github/workflows/ci_failure_email.md
+        env:
+          WORKFLOW: ${{ github.workflow }}
+          SERVER_URL: ${{ github.server_url }}
+          REPOSITORY: ${{ github.repository }}
+          RUN_ID: ${{ github.run_id }}
+      - name: Validate composer.json and composer.lock
+        run: composer validate --strict
+      - name: Cache Composer packages
+        id: composer-cache
+        uses: actions/cache@v3
+        with:
+          path: vendor
+          key: ${{ runner.os }}-php-${{ matrix.php_version}}-${{ hashFiles('**/composer.lock') }}
+      - name: Install dependencies
+        run: composer install --prefer-source --no-progress
+      - name: Run test suite
+        run: composer test
+      - name: Send mail on failure
+        if: ${{ failure() }}
+        uses: dawidd6/action-send-mail@v3
+        with:
+          server_address: smtp.gmail.com
+          server_port: 465
+          username: ${{secrets.CI_MAIL_USERNAME}}
+          password: ${{secrets.CI_MAIL_PASSWORD}}
+          to: wikidata-ci-status@wikimedia.de
+          from: ${{ github.repository }} CI
+          subject: CI job failed for ${{ github.repository }}
+          convert_markdown: true
+          html_body: file://${{ github.workspace }}/.github/workflows/ci_failure_email.md

.github/workflows/scrutinize.yaml

@@ -0,0 +1,31 @@
+name: Generate and upload test coverage
+on:
+  workflow_run:
+    workflows: ['Lint and Test']
+    types:
+      - completed
+
+jobs:
+  scrutinize:
+    runs-on: ubuntu-latest
+    if: ${{ github.event.workflow_run.conclusion == 'success' }}
+    steps:
+      - uses: actions/checkout@v4
+        with:
+          fetch-depth: 2
+      - name: Setup PHP
+        uses: shivammathur/setup-php@v2
+        with:
+          php-version: '8.0'
+          coverage: xdebug
+      - name: Cache Composer packages
+        uses: actions/cache@v4
+        with:
+          path: vendor
+          key: ${{ runner.os }}-${{ hashFiles('**/composer.lock') }}
+      - name: Generate PHP tests coverage
+        run:  vendor/bin/phpunit --coverage-clover coverage.clover
+      - name: Upload Scrutinizer coverage
+        uses: sudo-bot/action-scrutinizer@latest
+        with:
+          cli-args: "--repository g/wmde/Number --format=php-clover ./coverage.clover"

README.md

@@ -5,7 +5,7 @@ into such value objects, and formatters to turn them back into user consumable r
 
 It is part of the [DataValues set of libraries](https://github.com/DataValues).
 
-[![Build Status](https://secure.travis-ci.org/wmde/Number.png?branch=master)](http://travis-ci.org/wmde/Number)
+[![Build Status](https://github.com/wmde/Number/actions/workflows/lint-and-test.yaml/badge.svg?branch=master)](https://github.com/wmde/Number/actions/workflows/lint-and-test.yaml)
 [![Code Coverage](https://scrutinizer-ci.com/g/wmde/Number/badges/coverage.png?s=a62dd85d05eaf0c5505deed4e2bd53d34e50d158)](https://scrutinizer-ci.com/g/wmde/Number/)
 [![Scrutinizer Quality Score](https://scrutinizer-ci.com/g/wmde/Number/badges/quality-score.png?s=03279530fa55439de3ce094b985f861959ee7162)](https://scrutinizer-ci.com/g/wmde/Number/)