Loosening ResponsiveStyleValue to accept false

[ed0wolf]

I have a bunch of code that does something like:

sx={{ margin: [0, isTrue && 4] }}

The current types don't allow this because isTrue && 4 resolved to type false | number and false is not accepted as ResponsiveStyleValue. With the current types you need to write isTrue ? 4 : undefined.

Any chance we could loosen the types to allow for this kind of short form?

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[lachlanjc]

Seems good to me!

[hasparus]

Thanks for the PR, @ed0wolf.
I'm gonna merge it in a moment, update changelog and release it as part of 0.6.0-alpha.7.