build: raise required PHP version to 7.4

Signed-off-by: Bart Jaskulski <bjaskulski@protonmail.com>

README.md

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-[![coverage report](https://gitlab.com/wpdesk/wp-forms/badges/master/coverage.svg)](https://gitlab.com/wpdesk/wp-forms/commits/master)
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-
 WordPress Library for Form integration
 ===================================================
 
-
 ## Requirements
 
-PHP 7.0 or later.
+PHP 7.4 or later.
 
 ## Composer
 

composer.json

@@ -16,19 +16,17 @@
 		}
 	],
 	"require": {
-		"php": ">=7.0",
+		"php": ">=7.4 || ^8",
 		"ext-curl": "*",
 		"ext-json": "*",
 		"wpdesk/wp-persistence": "^2.0|^3.0",
 		"wpdesk/wp-view": "^2"
 	},
 	"require-dev": {
-		"phpunit/phpunit": "<7",
-		"phpstan/phpstan": "^0.12",
+		"phpunit/phpunit": "^9",
+		"wpdesk/phpstan-rules": "^1",
 		"wpdesk/wp-code-sniffer": "^1.2.3",
-		"10up/wp_mock": "*",
-		"szepeviktor/phpstan-wordpress": "^0.7.7",
-		"phpstan/extension-installer": "^1.1"
+		"10up/wp_mock": "*"
 	},
 	"autoload": {
 		"psr-4": {

phpcs.xml.dist

@@ -34,10 +34,10 @@
 	<config name="text_domain" value="wp-forms"/>
 
 	<!-- This value should be aligned with WordPress support version declared in plugin header -->
-	<config name="minimum_supported_wp_version" value="5.0"/>
+	<config name="minimum_supported_wp_version" value="6.4"/>
 
 	<!-- Set value aligned with supported PHP Version for PHPCompatibilityWP check. -->
-	<config name="testVersion" value="7.0-"/>
+	<config name="testVersion" value="7.4-"/>
 
 	<rule ref="WPDeskPlugin"/>