Fix running phpstan with newer PHP versions (e.g. 8.4)

phpstan 1.8 cannot run properly with PHP 8.4, but newer versions in the
1.x branch do, thus we change the requirement to phpstan ^1.9, to allow
version up to 2.0 (excluding).

Newer phpstan versions now detect common errors in regexes:

 Ignored error #Template type T of function resolve[()]{2} is not referenced in a parameter.# has an unescaped '()' which leads to ignoring all errors. Use '\(\)' instead.
 Ignored error #^Unsafe usage of new static[()]{2}.$# has an unescaped '()' which leads to ignoring all errors. Use '\(\)' instead.

So these regexes are also fixed by using non-evaluated string litterals
and escaping the parenthesis as recommended instead of using a weird
trick with the brackets.

Author: n-peugnet

php-packages/phpstan/composer.json

@@ -4,7 +4,7 @@
     "minimum-stability": "dev",
     "license": "MIT",
     "require": {
-        "phpstan/phpstan": ">=1.8.11 < 1.9.0",
+        "phpstan/phpstan": "^1.9",
         "nunomaduro/larastan": "^1.0"
     },
     "autoload": {

php-packages/phpstan/phpstan-baseline.neon

@@ -9,12 +9,12 @@ parameters:
 		  reportUnmatched: false
 
 		#	We ignore this because resolve can either take a class name as the generic return type or just a binding name.
-		- message: "#Template type T of function resolve[()]{2} is not referenced in a parameter.#"
+		- message: '#Template type T of function resolve\(\) is not referenced in a parameter.#'
 		  reportUnmatched: false
 
 		#	We ignore new static errors because we want extensibility.
 		#	@TODO: needs discussion.
-		- message: "#^Unsafe usage of new static[()]{2}.$#"
+		- message: '#^Unsafe usage of new static\(\).$#'
 		  reportUnmatched: false
 
 		# ConnectionInterface lacks methods that exist in the implementation,