feat: update dependencies

Updates the language server to 5.2.0
 - Don't suggest <?php on > character in HTML
 - Properly resolve self, static, parent
 - Warn if $this is used in invalid contexts

BREAKING CHANGE:
This update removes the PHP CodeSniffer formatting support.
To get the same formatter back in VS Code, please install https://marketplace.visualstudio.com/items?itemName=ikappas.phpcs
See felixfbecker/php-language-server#501 for details.

Author: felixfbecker

composer.json

@@ -2,7 +2,7 @@
     "minimum-stability": "dev",
     "prefer-stable": true,
     "require": {
-        "felixfbecker/language-server": "v4.6.4"
+        "felixfbecker/language-server": "^5.0.0"
     },
     "scripts": {
         "parse-stubs": "LanguageServer\\ComposerScripts::parseStubs",