[TASK] Add initial compatibility with TYPO3 v9

composer.json

@@ -7,8 +7,8 @@
     "GPL-2.0+"
   ],
   "require": {
-    "typo3/cms-core": ">=7.6.0,<8.9.99",
-    "typo3/cms-scheduler": ">=7.6.0,<8.9.99"
+    "typo3/cms-core": ">=7.6.0,<9.9.99",
+    "typo3/cms-scheduler": ">=7.6.0,<9.9.99"
   },
   "keywords": [
     "TYPO3 CMS"

ext_emconf.php

@@ -8,8 +8,8 @@ $EM_CONF[$_EXTKEY] = array(
 	'category' => 'extension',
     'constraints' => array(
         'depends' => array(
-            'typo3' => '7.6.0-8.99.99',
-            'scheduler' => '7.6.0-8.99.99'
+            'typo3' => '7.6.0-9.99.99',
+            'scheduler' => '7.6.0-9.99.99'
         ),
         'conflicts' => array(
         ),