Fix #1325 - BigCommerce is wrongly detected

Remove the "env" property that could incorrectly match a function in the global scope. Removed the trailing 'v' from the "script" and "html" entries that looks for the BigCommerce CDN paths since they can begin with letters other than 'v' like 's' in the to examples below.

Check against the following URLs :
https://shopmonarch.averydennison.com/
http://shop.panthers.com/