PHP 7.4 Deprecated Array and string offset access syntax with curly braces

Hello Alexander,

Thanks for your great plugin. Please be advised that after installing PHP 7.4, I have the following warnings:

Deprecated: Array and string offset access syntax with curly braces is deprecated in /var/www/html/wp-content/plugins/wp-testing/src/Facade.php on line 52

Deprecated: Array and string offset access syntax with curly braces is deprecated in /var/www/html/wp-content/plugins/wp-testing/src/Facade.php on line 52

Deprecated: Function get_magic_quotes_gpc() is deprecated in /var/www/html/wp-content/plugins/wp-testing/vendor/flourish/flourish/fRequest.php on line 153

Deprecated: Function get_magic_quotes_gpc() is deprecated in /var/www/html/wp-content/plugins/wp-testing/vendor/flourish/flourish/fRequest.php on line 153

Easy to fix by changing to square brackets.

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