Move to github actions

Author: phpfui

.github/dependabot.yml

@@ -0,0 +1,8 @@
+version: 2
+updates:
+- package-ecosystem: composer
+  directory: "/"
+  schedule:
+    interval: daily
+    time: "10:00"
+  open-pull-requests-limit: 10

.github/workflows/tests.yml

@@ -0,0 +1,40 @@
+name: Tests
+
+on: [push, pull_request]
+
+jobs:
+  php-tests:
+    runs-on: ${{ matrix.os }}
+    strategy:
+      fail-fast: true
+      matrix:
+        php: [8.0, 7.4, 7.3]
+        dependency-version: [prefer-stable]
+        os: [ubuntu-latest, windows-latest]
+
+    name: ${{ matrix.os }} - PHP${{ matrix.php }} - ${{ matrix.dependency-version }}
+
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v2
+
+      - name: Cache dependencies
+        uses: actions/cache@v2
+        with:
+          path: ~/.composer/cache/files
+          key: dependencies-php-${{ matrix.php }}-composer-${{ hashFiles('composer.json') }}
+
+      - name: Setup PHP
+        uses: shivammathur/setup-php@v2
+        with:
+          php-version: ${{ matrix.php }}
+          extensions: dom, curl, libxml, mbstring, zip, intl
+          coverage: none
+
+      - name: Install dependencies
+        run: |
+          composer update --${{ matrix.dependency-version }} --prefer-dist --no-interaction --ignore-platform-reqs
+
+      - name: Execute tests
+        run: vendor/bin/phpunit
+

css/markdown.css

@@ -4,7 +4,6 @@ hr {
 
 .markdown-body .octicon {
   display: inline-block;
-  fill: currentColor;
   vertical-align: text-bottom;
 }