wasm-pack build should copy over the license file

[tschneidereit]

Currently, license files aren't copied over. It's not entirely clear to me how best to do this, given that license files can have different names. Perhaps do (the equivalent of) cp LICENSE* pkg?

[ashleygwilliams]

oh dang, good catch! do you think it would be reasonable enough to copy over whatever the LICENSE key in Cargo.toml points to? that'd be my first impl strategy...

[tschneidereit]

Ah, yes—I think that'd be entirely adequate.

[mstallmo]

If no one has jumped on this one yet I'd like to take a crack at implementing this!

[ashleygwilliams]

you got it @mstallmo - go for it! thanks so much!