Fix bug introduced by yaml properties update

[chaecramb]

Fix #194

[edamamev]

AH! So we just have to build the files with npm according to this website.
Disregard, but thanks for the addition!

---First Note---
Hey @chaecramb !
I was wondering whether you could fork your change so we could have access to the working plugin?
I'm not sure how to convert your solution into something that Obsidian will run. Any advice or help would be cool :)
Thanks!

[edamamev]

Can confirm: this fix works oml

[dangtrivan15]

I crave for this PR :(

[becknik]

This basically renders the plugin unusable for the 1.4 release on the 31. august.

Please merge this already, people like me rely on this plugin for their exam preparation!

[QuinnHerden]

+1

Please, merge this @reuseman :)

[edamamev]

Ok, for people who want a plugin that works, feel free to go to https://github.com/edamame-v/flashcards-obsidian for a forked copy of this plugin.

The only change is this Fix, feel free to give it a look.