feat: update tests, remove psalm, edit gitattributes with new files

Author: Rahe

.gitattributes

@@ -5,10 +5,14 @@ bin export-ignore
 tests export-ignore
 .distignore export-ignore
 .gitignore export-ignore
+.wp-env.json export-ignore
+node-modules export-ignore
 composer.json export-ignore
 composer.lock export-ignore
 grumphp.yml export-ignore
 phpcs.xml export-ignore
 phpunit.xml.dist export-ignore
 psalm.xml export-ignore
-README.md export-ignore
+README.md export-ignore
+package.json export-ignore
+package-lock.json export-ignore

.gitignore

@@ -12,7 +12,6 @@
 /bin/release/
 
 # Tests
-/tests/*.txt
 /tests/coverage/
 .phpunit.result.cache
 

composer.json

@@ -20,7 +20,6 @@
     "phpcompatibility/php-compatibility": "^9.3",
     "phpro/grumphp-shim": "^1.3",
     "squizlabs/php_codesniffer": "^3.5",
-    "vimeo/psalm": "^4.6",
     "wp-coding-standards/wpcs": "^2.3",
     "overtrue/phplint": "^2.3",
     "wp-phpunit/wp-phpunit": "^6.5",