Add a way to specify which browser vivify should open.

[tomasriveral]

Usecase: I don't want to use vivify on my main browser with all the customization. I want to use it more on a lightweight browser or something similar.

I don't know typescript so i can't code it and don't how feasable it is. Maybe with some flags when we launch viv?

Nonetheless, thank you jannis for your project. I found it two days ago and it is exactly what I need. I sent a PR to nixpkgs to add vivify.vim to the repo. It should be done in some hours.

[jannis-baum]

Hello, great to hear you like Vivify!

Specifying which browser to use seems useful, good idea. I'll add that as a new config option, it's easy to implement. Hope I'll get to it soon.

Thanks for the nixpkgs PR as well, that's cool. Vivify is also useful as a standalone without the Vim plugin by the way :p having the option to just use a CLI without needing to open the file in Vim was one of the main reasons I decided to start Vivify back then ^^

[jannis-baum]

Hey I implemented the new option in #293 in case you want to check it out early :) If not the next release with that should hopefully come soon