fix(deps): remove stream utils

[talentlessguy]

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Summary

See e18e/ecosystem-issues#156

Removes is-stream, from2-array, through2-filter, flush-write-stream and through2-map in favor of built-in stream utils

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[serhalp]

LGTM. I rebased this and fixed up a few weeks of conflicts, and tested the ntl deploy flows locally to be extra safe. Thank you!

[ndhoule]

Let's revert the is-stream changes, otherwise looks good to me.

@talentlessguy Thanks for getting this PR started, and thanks @serhalp for finishing it up!