feat(lint): add phpqa with phpstan and psalm

.phpqa.yml

@@ -0,0 +1,11 @@
+phpqa:
+    output: cli
+    tools: phpcs:0,phpcpd:0,phpstan:0
+    ignoredDirs: node_modules,vendor,tests
+
+phpcs:
+    standard: phpcs.xml.dist
+
+phpcpd:
+    minLines: 5
+    minTokens: 70

composer.json

@@ -5,7 +5,6 @@
   "license": "GPL-2.0-only",
   "require": {
     "cedaro/wp-plugin": "0.4.0",
-    "dusank/knapsack": "10.0.0",
     "php": ">=7.2",
     "psr/log": "1.1.3"
   },
@@ -15,7 +14,13 @@
     "phpcompatibility/phpcompatibility-wp": "2.1.0",
     "phpunit/phpunit": "9.1.4",
     "squizlabs/php_codesniffer": "3.5.5",
-    "wp-coding-standards/wpcs": "2.2.1"
+    "wp-coding-standards/wpcs": "2.2.1",
+    "slevomat/coding-standard": "^6.3",
+    "edgedesign/phpqa": "^1.23",
+    "php-stubs/wordpress-stubs": "^5.4",
+    "szepeviktor/phpstan-wordpress": "^0.6.0",
+    "nette/neon": "^3.1",
+    "vimeo/psalm": "^3.11"
   },
   "autoload": {
     "psr-4": {
@@ -31,7 +36,10 @@
     "install-codestandards": [
       "Dealerdirect\\Composer\\Plugin\\Installers\\PHPCodeSniffer\\Plugin::run"
     ],
-    "lint": "phpcs",
+    "lint": [
+      "phpqa",
+      "psalm"
+    ],
     "lint:fix": "phpcbf",
     "test": "phpunit"
   }