Update phpstan/phpstan requirement from ^1.10 to ^1.10 || ^2.0

---
updated-dependencies:
- dependency-name: phpstan/phpstan
  dependency-version: 2.1.40
  dependency-type: direct:development
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

composer.json

@@ -18,7 +18,7 @@
 		"php": "^7.2|^8.0"
 	},
 	"require-dev": {
-		"phpstan/phpstan": "^1.10",
+		"phpstan/phpstan": "^1.10 || ^2.0",
 		"phpunit/phpunit": "~5|~9"
 	},
 	"autoload": {