Remove usage of depracated KeyboardEvent.keyCode

[wamukat]

This PR resolve #44 .

[urish]

First of all, thank you!

I'm thinking it might make even more sense to move the SPACE_KEYS array into a common file (e.g. src/utils/keys.ts or something similar), instead of redefining it in each element that needs it. WDYT?

[wamukat]

Thanks for your review!
I will try to move SPACE_KEYS array to common file.

[wamukat]

@urish I fixed. Please review again.

[sutaburosu]

@takuma-watanabe there's also triggerKeys in the Nano element that could be adapted to use utils\keys.ts. I included Enter in that list because I found pressing Space could also scroll the window in some circumstances.

[urish]

good point @sutaburosu, I'd love to see this in a subsequent PR

[sutaburosu]

I'll do that now. :)

[wamukat]

@sutaburosu I couldn't notice that point. Thank you.