update setup

• build: remove composer.lock from template
• build: add WP Desk as package author
• build: declare latest low support version
• build: remove composer's platform check
• build: add phpstan as direct dependency/update phpunit
• refactor: update phpunit setup and example test
• build: update phpstan config

composer.json

@@ -3,7 +3,12 @@
 	"authors": [
 		{
 			"name": "Krzysiek",
-			"email": "krzysiek@wpdesk.net"
+			"email": "krzysiek@wpdesk.net",
+			"role": "Lead Developer"
+		},
+		{
+			"name": "WP Desk",
+			"role": "Owner"
 		}
 	],
 	"autoload": {
@@ -20,27 +25,32 @@
 		"autoloader-suffix": "PluginTemplate",
 		"sort-packages": true,
 		"platform": {
-			"php": "7.2"
+			"php": "7.3.20"
 		},
 		"allow-plugins": {
 			"dealerdirect/phpcodesniffer-composer-installer": true,
 			"cweagans/composer-patches": true,
 			"wpdesk/wp-codeception": true,
 			"wpdesk/wp-wpdesk-composer": true,
-			"kylekatarnls/update-helper": true
-		}
+			"kylekatarnls/update-helper": true,
+			"phpstan/extension-installer": true
+		},
+		"platform-check": false
 	},
 	"prefer-stable": true,
 	"minimum-stability": "stable",
 	"require": {
-		"php": ">=7.2",
+		"php": ">=7.3 | ^8",
 		"psr/log": "^1.1.4",
 		"wpdesk/wp-wpdesk-helper-override": "^1.1.0"
 	},
 	"require-dev": {
 		"10up/wp_mock": "*",
-		"phpunit/phpunit": "<7",
+		"phpstan/extension-installer": "^1.3",
+		"phpstan/phpstan": "^1",
+		"phpunit/phpunit": "^8 | ^9",
 		"roave/security-advisories": "dev-latest",
+		"szepeviktor/phpstan-wordpress": "^1.3",
 		"wpdesk/wp-builder": "^2.0.0",
 		"wpdesk/wp-codeception": "^2.7.4",
 		"wpdesk/wp-plugin-flow-free": "^1.0.2",
@@ -57,7 +67,7 @@
 		"po-files": {
 			"pl_PL": "pl_PL.po"
 		},
-		"php-requires": "7.2"
+		"php-requires": "7.3"
 	},
 	"scripts": {
 		"test": "echo composer is alive",