[Feature] Be able to select option with Return key

[GautierT]

I'm submitting a...

[ ] Regression (a behavior that used to work and stopped working in a new release)
[ ] Bug report  
[ ] Performance issue
[x] Feature request
[ ] Documentation issue or request
[ ] Other... Please describe:

What is the motivation / use case for changing the behavior?

Be able to select items by pressing Return key. So when we navigate with keyboard on the options we can select one with Return and don't leave the keyboard.

BTW : Thanks for this awesome package !

[faizanu94]

I've added this feature here, requesting for review!