[TASK] Upgrade to PHPStan 2.x and Rector 2.x (#777)

.github/dependabot.yml

@@ -16,6 +16,11 @@ updates:
           interval: "daily"
       allow:
           - dependency-type: "development"
+      ignore:
+        - dependency-name: "phpstan/*"
+        - dependency-name: "phpunit/phpunit"
+          versions: [ ">= 9.0.0" ]
+        - dependency-name: "rector/rector"
       versioning-strategy: "increase"
       commit-message:
           prefix: "[Dependabot] "

composer.json

@@ -29,10 +29,10 @@
     "require-dev": {
         "php-parallel-lint/php-parallel-lint": "1.4.0",
         "phpstan/extension-installer": "1.4.3",
-        "phpstan/phpstan": "1.12.9",
-        "phpstan/phpstan-phpunit": "1.4.0",
+        "phpstan/phpstan": "1.12.12 || 2.0.3",
+        "phpstan/phpstan-phpunit": "1.4.1 || 2.0.1",
         "phpunit/phpunit": "8.5.40",
-        "rector/rector": "1.2.10"
+        "rector/rector": "1.2.10 || 2.0.0"
     },
     "suggest": {
         "ext-mbstring": "for parsing UTF-8 CSS"

config/phpstan-baseline.neon

@@ -1,12 +1,20 @@
 parameters:
 	ignoreErrors:
 		-
-			message: "#^Call to an undefined method Sabberworm\\\\CSS\\\\OutputFormat\\:\\:setIndentation\\(\\)\\.$#"
+			message: '#^Call to an undefined method Sabberworm\\CSS\\OutputFormat\:\:setIndentation\(\)\.$#'
+			identifier: method.notFound
 			count: 2
 			path: ../src/OutputFormat.php
 
 		-
-			message: "#^Class Sabberworm\\\\CSS\\\\Value\\\\Size constructor invoked with 5 parameters, 1\\-4 required\\.$#"
+			message: '#^Class Sabberworm\\CSS\\Value\\Size constructor invoked with 5 parameters, 1\-4 required\.$#'
+			identifier: arguments.count
 			count: 2
 			path: ../src/RuleSet/DeclarationBlock.php
 
+		-
+			message: '#^@covers value \\Sabberworm\\CSS\\Value\\Value\:\:parseValue\(\) references an invalid method\.$#'
+			identifier: phpunit.coversMethod
+			count: 2
+			path: ../tests/ParserTest.php
+