Drop stable18, stble19 and php7.2

Signed-off-by: Christoph Wurst <christoph@winzerhof-wurst.at>

.github/workflows/test.yml

@@ -9,11 +9,6 @@ jobs:
       matrix:
         php-version: [7.3, 7.4]
         nextcloud-version: ['stable20', 'master']
-        include:
-          - php-version: 7.2
-            nextcloud-version: 'stable18'
-          - php-version: 7.3
-            nextcloud-version: 'stable19'
     name: Nextcloud ${{ matrix.nextcloud-version }} php${{ matrix.php-version }} unit tests
     steps:
     - name: Set up php${{ matrix.php-version }}

appinfo/info.xml

@@ -17,11 +17,11 @@
 	<screenshot>https://raw.githubusercontent.com/nextcloud/twofactor_u2f/4e0542d888236b7f212bed0b536244d08803466f/screenshots/settings.png</screenshot>
 
 	<dependencies>
-		<php min-version="7.2" max-version="7.4"/>
+		<php min-version="7.3" max-version="7.4"/>
 		<database>sqlite</database>
 		<database>mysql</database>
 		<database>pgsql</database>
-		<nextcloud min-version="18" max-version="21" />
+		<nextcloud min-version="20" max-version="21" />
 	</dependencies>
 
 	<two-factor-providers>

composer.json

@@ -10,7 +10,7 @@
 		}
 	],
 	"require": {
-		"php": ">=7.2.0",
+		"php": ">=7.3.0",
 		"yubico/u2flib-server": "^1.0.1"
 	},
 	"require-dev": {
@@ -33,7 +33,7 @@
 		"optimize-autoloader": true,
 		"classmap-authoritative": true,
 		"platform": {
-			"php": "7.2.0"
+			"php": "7.3.0"
 		}
 	}
 }