Fix history not working properly
Fix history not working properly

This is a bug introduced by yours truly in
https://github.com/sharkdp/insect/pull/299; in readline's docs[1] is
this sentence about `historySize`:

> To disable the history set this value to 0.

My mind read it as this:

> To disable the history **limit** set this value to 0.

[1]: https://nodejs.org/api/readline.html#readlinepromisescreateinterfaceoptions

sharkdp/insect,sharkdp/insect,sharkdp/insect