Merge pull request #745 from nextcloud/dependabot/composer/phpunit/phpunit-8.5.8

Bump phpunit/phpunit from 7.5.20 to 8.5.8

Author: nickvergessen

composer.json

@@ -4,7 +4,7 @@
 	"license": "AGPL",
 	"require": {},
 	"require-dev": {
-		"phpunit/phpunit": "^7.5",
+		"phpunit/phpunit": "^8.5",
 		"nextcloud/coding-standard": "^0.3.0"
 	},
 	"config": {