add a mapping ability to the interpolate method

[rocman]

This makes it possible to do the interpolation on properties of any type. For example, the contentOffset of a ScrollView.

[ghost]

By analyzing the blame information on this pull request, we identified @lelandrichardson and @vjeux to be potential reviewers.

[ghost]

@rocman updated the pull request.

[rocman]

@fatihict big thanks for your reviewing. The change you mentioned above is a mistake. And I've fixed it just now. Thanks.

[ghost]

@rocman updated the pull request.

[lelandrichardson]

An API like this won't be compatible with native animations, unfortunately. I wonder if there is any way we could make it so that it would be?

Have to run right now, but will look at this PR a bit more and think about it. You may want to look at this PR for comparison, which could achieve something similar: animatedjs/animated#12

[ghost]

It's been a while since the last commit was reviewed and the labels show this pull request needs review. Based on the blame information for the files in this pull request we identified @lelandrichardson as a potential reviewer. Could you take a look please or cc someone with more context?

[mkonicek]

@rocman I'm going through all pull requests and noticed this one hasn't been updated in a while and the last comment mentions:

An API like this won't be compatible with native animations, unfortunately. I wonder if there is any way we could make it so that it would be?

I'll close this pull request so it doesn't stay open indefinitely but please send a new one if you want to continue working on this.