Is PHP 5.3 essential for version 7.x-1.6

I am wondering if PHP version 5.3 is essential for version 7.x-1.6 of Webform Validation? My webhost currently only supports PHP version 5.2, so I got an error message when I updated Webform Validation to version 7.x-1.6. I tried a work-around of changing the PHP version specified in the module .info file from 5.3 to 5.x and that seems to have worked. But while the module installed without any errors and appears to be functioning as expected, I'm wondering if amending the .info file will have any ramifications down the line?