PHP starting tag support

[cprn]

It would be nice for coc-pairs to detect php file type and have a special support for < as the 1st character of the 1st or 2nd line (because 1st line sometimes contains a shebang) that would delete the closing > if the next character is ?.

The issue is whenever I type < at the beginning of a PHP file coc-pairs adds the closing angular bracket > which is not only cumbersome to delete each time the user creates a new class but also prevents some popular (e.g. honza's] PHP snippets from working correctly, e.g. <? expands to the following (notice the closing bracket):

<?php

VISUAL>

[chemzqm]

PR welcome.