Feature request: Is here proper contact to do it

[Budi <budikusasi@xxxxxxxxx>]

So sorry if here is not exactly proper contacted place to do Feature
Request, but can't help to ask the so long demanded need (on Bash at
least 4 years, confirmed they cannot/won't care it, here Zsh almost a
year)

Have Zsh being able to ignore letter case (case-insensitive) when
searching command history
by widget:

history-search-backward or history-beginning-search-backward

as Zsh far more configurable than Bash, so is my hope to have it solved

Anyone has any idea to get it for temporary as a workaround in Zsh ?
Thanks in advance