micro optimization: reuse resolvers for pseudo elements about nwsapi

[milahu]

same goes for div::before and div:before
both selectors should use the same resolver

const baseSel = selector
.replace(/:?:(after|before|first-letter|first-line)/g, '');

source

backward compatibility is a pain ....

[dperini]

@milahu
thank you so much for the suggestion and for the code change in the pull request.
I will have a look and do a test cycle to make sure nothing breaks, then I will commit your request.

[milahu]

: ]

this issue is obsolete (full revoke), resolvers can not be reused
they should match the pseudo element, not the base element

the old implementation was just a placeholder
my proposed solution is in PR #40