[TASK] Enable TYPO3 10 composer update

composer.json

@@ -6,7 +6,7 @@
     "license": [
         "GPL-2.0-or-later"
     ],
-    "version": "5.7.11",
+    "version": "6.0.0-dev",
     "repositories": [
         {
             "type": "composer",
@@ -14,8 +14,7 @@
         }
     ],
     "require": {
-        "php": "^7.0",
-        "typo3/cms-core": "^8.7.0 || ^9.5.1"
+        "typo3/cms-core": "^9.5.1 || ^10.4.0"
     },
     "require-dev": {
         "roave/security-advisories": "dev-master"

ext_emconf.php

@@ -8,8 +8,8 @@ $EM_CONF['sg_mail'] = [
 	'title' => 'Mail Templates',
 	'description' => 'Mail Templates',
 	'category' => 'module',
-	'version' => '5.7.11',
-	'state' => 'stable',
+	'version' => '6.0.0-dev',
+	'state' => 'experimental',
 	'uploadfolder' => FALSE,
 	'createDirs' => '',
 	'clearcacheonload' => FALSE,
@@ -18,8 +18,8 @@ $EM_CONF['sg_mail'] = [
 	'author_company' => 'sgalinski Internet Services (https://www.sgalinski.de)',
 	'constraints' => [
 		'depends' => [
-			'typo3' => '8.7.0-9.5.99',
-			'php' => '7.0.0-',
+			'typo3' => '9.5.0-10.4.99',
+			'php' => '7.3.0-7.4.99',
 		],
 		'conflicts' => [
 		],