Allow support for double quotes

[nickjer]

Currently it seems this code is fairly strict in only supporting single quotes, e.g.,

$.key[?(@.size == 'small')].city

I am wondering if we can loosen this restriction and also allow for double quotes, e.g.,

$.key[?(@.size == "small")].city

The reason for this is when using this syntax in a CLI it is best to wrap this in single quotes as $ is a special character for most shells that gets interpolated when using double quotes. So the following would theoretically work without having to escape single quotes...

my_cli --path '$.key[?(@.size == "small")].city' my_data.json

[besok]

Fair enough, this sounds logical.
Let's implement it.

I can come back to it in a couple of weeks.