Use of str_starts_with incompatible with PHP 7

[kirk-loretz-fsn]

Version 2.3.2 added a use of str_starts_with via PR #113.

ringcentral-php/src/Platform/Platform.php

Line 117 in 3135589

return str_starts_with($path, $key);

str_starts_with requires PHP 8, so the designation of this library as PHP 7.2 compatible is incorrect.

ringcentral-php/composer.json

Line 16 in 3135589

"php": ">=7.2",

Here is a polyfill:

function str_starts_with(string $haystack, string $needle): bool {
    return \strncmp($haystack, $needle, \strlen($needle)) === 0;
}