fix(composer): Compatibility with Composer 2.0

Author: gaetan-hexadog

composer.json

@@ -24,13 +24,13 @@
         "class": "Hexadog\\LaravelThemeInstaller\\ThemeInstallerPlugin"
     },
     "require-dev": {
-        "composer/composer": "^1.3",
+        "composer/composer": "^1.3|^2.0",
         "squizlabs/php_codesniffer": "3.*",
         "mockery/mockery": "^1.4",
         "phpunit/phpunit": "^8.0"
     },
     "require": {
-        "composer-plugin-api": "^1.1",
+        "composer-plugin-api": "^1.1|^2.0",
         "php": "^7.3"
     },
     "scripts": {