Set signature help active signature to best match when there are multiple signatures

[bmewburn]

Currently arg count is the only selector here. Could expand to type checking too but when there is a type overlap on first parameter(s) then it is not helpful.

eg https://www.php.net/manual/en/function.strtr.php

strtr ( string $str , string $from , string $to ) : string
strtr ( string $str , array $replace_pairs ) : string

Updating to LSP 3.15 / node-language-server 6 which will send the user selected active signature would also solve this.