Deny install of TYPO3 8.0-8.6

Author: helhum

composer.json

@@ -22,7 +22,7 @@
     "license": "GPL-2.0-or-later",
     "require": {
         "php": ">=5.5.0",
-        "typo3/cms-core": "^6.2 || ^7.6 || ^8.0"
+        "typo3/cms-core": "^6.2 || ^7.6 || ^8.7"
     },
     "require-dev": {
         "nimut/testing-framework": "^1.0"