adds support for list lpos command

[kenus34]

This commit adds support for the lpos command added in Redis 6.0.6

[sazzad16]

This is incomplete. COUNT can used alone. But it doesn't support that. There's also MAXLEN option.

Params approach is better fit for this command.

[kenus34]

@sazzad16 Got it, I will do the Params approach.
also lpos returns a list of indexes when used with COUNT and a single index without COUNT so do you think making two sets of commands lpos and lposWithCount would make more sense in this case?
Splitting them would give us two sets of commands one set with return type long(lpos) and others with return type list(lposWithCount)

[sazzad16]

@kenus34 Yes. But you don't have to name lposWithCount. You may have following 2/3 methods:

• Long lpos(key, element) *[optional]
• Long lpos(key, element, lposParams)
• Lis<Long> lpos(key, element, lposParams, long count)

[kenus34]

@sazzad16 Thanks a lot. I have made the changes and pushed the same.

[sazzad16]

Almost done!

[kenus34]

Thanks for the suggestion. I have resolved the comments.