Take boolean attributes into account

[ryota-ka]

Updated modules/props.js so that it will take boolean attributes into account.
(false values for such attributes shouldn't be interpreted as "false")

[acstll]

Thank you for the PR.

Do you think you could add a test for this change?

[ryota-ka]

@acstll Thank you for your quick response.

I've added a test case for this change.
Also, I've changed const to var in 00c5476.

If it looks fine, please let me know before merging. I'll squash my commits.

[acstll]

Looks good to me!

I'll ping @paldepind to double check before releasing this. I saw he was active on this project recently, and I haven't touched this in a very long time.

This is a bug fix but I'd do a major (6.0.0) since I believe this could break people's code, no?

[ryota-ka]

I've squashed the fixup! commit and force-pushed.

@paldepind Please feel free to merge this if you feel it's okay 🙏

[ryota-ka]

@paldepind Pinging for your review (Sorry for interruption 🙇)

[ryota-ka]

@acstll It's been four months.
Shall we wait for @paldepind's review any more?

Personally I'm also 👍 for making a major version bump.

[acstll]

Hey, time flies. Sorry you had to wait this long. I think we can move forward. I'll merge and cut a major release this week.

[acstll]

It's done @ryota-ka I hope everything's OK, haven't done this in a while! Thanks again for your patience.

[ryota-ka]

@acstll I also appreciate your review and releasing the new version! I'll enjoy it!