[HOLD] Fix null being ignored in storage with mergeCollection

[paultsimura]

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Screenshots/Videos

Android: Native

Android: mWeb Chrome

iOS: Native

iOS: mWeb Safari

MacOS: Chrome / Safari

MacOS: Desktop

[tgolen]

I'm placing this on HOLD right now in order for QA to be done on the latest version of Onyx without more un-QAed PRs from being merged.

[chrispader]

@paultsimura i integrated these changes into #519.

The test looks good and also your version of prepareKeyValuePairsForStorage with reduce is more readable, though there was one problem. If the shouldRemoveNestedNullsInObjects parameter is set to false, we still need to call removeNullValues, because this function will remove top-level null values completely...

[paultsimura]

@paultsimura i integrated these changes into #519.

The test looks good and also your version of prepareKeyValuePairsForStorage with reduce is more readable, though there was one problem. If the shouldRemoveNestedNullsInObjects parameter is set to false, we still need to call removeNullValues, because this function will remove top-level null values completely...

Awesome, thanks 🙇