Updating PHP version to be same as tests

Author: Renato Alves

.phpcs.xml

@@ -22,7 +22,7 @@
 
 	<!-- Rules: Check PHP version compatibility -->
 	<!-- https://github.com/PHPCompatibility/PHPCompatibility#sniffing-your-code-for-compatibility-with-specific-php-versions -->
-	<config name="testVersion" value="5.6-"/>
+	<config name="testVersion" value="7.0-"/>
 	<!-- https://github.com/PHPCompatibility/PHPCompatibilityWP -->
 	<rule ref="PHPCompatibilityWP"/>
 

README.txt

@@ -3,7 +3,7 @@ Contributors: kidunot89, ranaaterning, jasonbahl, saleebm
 Tags: GraphQL, WooCommerce, WPGraphQL
 Requires at least: 4.9
 Tested up to: 5.2
-Requires PHP: 5.6
+Requires PHP: 7.0
 Requires WooCommerce: 3.0.0
 Requires WPGraphQL: 0.6.0+
 Works with WPGraphQL-JWT-Authentication: 0.4.0+