Remove support for Composer 1.x

.github/workflows/main.yml

@@ -61,36 +61,3 @@ jobs:
           echo "::group::Tests (w/ phar composer/composer)"
           COMPOSER_AUDIT_TEST_COMPOSER_BINARY=$(which composer) vendor/bin/simple-phpunit --verbose
           echo "::endgroup::"
-  # Verifies that the plugin entry point still parses on PHP 5.3, users of 5.3
-  # cannot use this Composer plugin but at least it won't break their Composer.
-  legacy:
-    runs-on: ubuntu-latest
-    name: PHP 5.3
-    steps:
-      - uses: actions/checkout@v2
-      - uses: shivammathur/setup-php@d30ad8b1843ace22e6698ab99bbafaa747b6bd0d
-        with:
-          php-version: 5.3
-          tools: composer:2.2
-          coverage: none
-      - name: Syntax check
-        run: |
-          while read file; do
-            php -l "$file"
-          done < <(find src/Legacy -type f -name "*.php")
-      - name: Integration test
-        run: |
-          composer global config allow-plugins.cs278/composer-audit true
-          composer global config repositories.0 path "$(pwd)"
-          composer global require --ignore-platform-reqs symfony/yaml '~4.4'
-          composer global require --ignore-platform-reqs cs278/composer-audit '*@dev'
-
-          set +e
-          composer global audit -vvv
-          result=$?
-          set -e
-
-          if [ $result -ne 2 ]; then
-            echo "Expected audit command to exit with error code 2, got: ${result}" >&2
-            exit 1
-          fi

composer.json

@@ -11,8 +11,8 @@
     ],
     "minimum-stability": "stable",
     "require": {
-        "php": ">= 7.1",
-        "composer-plugin-api": "^1.1 || ^2",
+        "php": ">= 7.2",
+        "composer-plugin-api": "^2",
         "symfony/yaml": "^4.4 || ^5 || ^6 || ^7"
     },
     "require-dev": {
@@ -35,6 +35,6 @@
         "sort-packages": true
     },
     "extra": {
-        "class": "Cs278\\ComposerAudit\\Legacy\\ComposerPlugin"
+        "class": "Cs278\\ComposerAudit\\ComposerPlugin"
     }
 }