Use our own fs instead of Node's fs in the Npm package installer

[mischnic]

Probably one case of Callback must be a function?

[height]

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[parcel-benchmark]

Benchmark Results

Kitchen Sink ✅

Timings

Description	Time	Difference
Cold	2.26s	+19.00ms
Cached	316.00ms	-11.00ms

Cold Bundles

No bundle changes detected.

Cached Bundles

Bundle	Size	Difference	Time	Difference
dist/legacy/index.c1bc86aa.css	94.00b	+0.00b	1.33s	-71.00ms 🚀
dist/modern/index.57a95cbe.css	94.00b	+0.00b	1.33s	-70.00ms 🚀

React HackerNews ✅

Timings

Description	Time	Difference
Cold	11.37s	-192.00ms
Cached	530.00ms	+23.00ms

Cold Bundles

No bundle changes detected.

Cached Bundles

No bundle changes detected.

AtlasKit Editor ✅

Timings

Description	Time	Difference
Cold	1.23m	-768.00ms
Cached	1.82s	+23.00ms

Cold Bundles

No bundle changes detected.

Cached Bundles

No bundle changes detected.

Three.js ✅

Timings

Description	Time	Difference
Cold	7.73s	-37.00ms
Cached	423.00ms	-18.00ms

Cold Bundles

No bundle changes detected.

Cached Bundles

No bundle changes detected.

Click here to view a detailed benchmark overview.