close JsonWriters

[gjvanderheiden]

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Closing jsonwriters. My local build reacts faster and less "device not responding" issues. Updated a bunch of dependencies and used my own pr about updating json blabla. But closing surely doesn't hurt.

[gjvanderheiden]

Seen / stole this in/from #116. Searched on createWriter and found 3 more occurrences.

[yfre]

@gjvanderheiden can we reopen this PR? i would like to merge it