Updates for libuv-1.34#84

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take-cheeze wants to merge 13 commits intomattn:masterfrom

take-cheeze:v1.33.1

Commits on Nov 28, 2019

[WIP] Updates for libuv-1.33
take-cheeze
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Commits on Dec 20, 2019

Add some tests
take-cheeze
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Commits on Jan 19, 2020

Fix condition of FS.open callback
take-cheeze
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