Added 'since' and 'until' selection modes

[theonelucas]

No description provided.

[SaturnTeam]

Please don't change the styles just because you don't like them. I don't like them too, but it's better to keep original material code styles, to reduce my time on upgrading library. Just don't original strings it is not needed.
Why do you need number type? I see a lot of strings like D | number | null;

[SaturnTeam]

@theonelucas https://github.com/SaturnTeam/saturn-datepicker/pull/88/files#diff-03ab74bcc3e5325554698546b828a0d8L23

[SaturnTeam]

@theonelucas Look at diff. There are a lot of lines where you replaced == to === and other style-only changes. I asked you to not do that.

[thomas-parrish]

Why hasn't this been accepted yet?

[SaturnTeam]

@theonelucas because the author ignores my remarks (for example file.txt is still inside pr). And I have doubts about hard-coded selectors.

[GeorgKa]

That would be a great feature, is there any news?