Update dependency chokidar to v3

This MR contains the following updates:

Package	Type	Update	Change	References
chokidar	devDependencies	major	^2.0.1 -> ^3.0.0	source

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Release Notes

paulmillr/chokidar

v3.3.1

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v3.3.0

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FSWatcher#close() method became async. This ensures IO operations are finished properly and fixes a few segfaulty crashes.

v3.2.3

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v3.2.2

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v3.2.1

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Improve Linux RAM usage by 50%. Stability optimizations. Race condition fixes. Windows glob fixes.

v3.2.0

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v3.1.1

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Fixes "Expected pattern to be a non-empty string" (#​871)

v3.1.0

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Dotfiles are no longer filtered out by default. Use ignored option if needed.

Improve Linux performance by 50%.

v3.0.2

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• Brings bigint support to stat outputs on windows.
• Fixes ready event emission for symlink directories.

v3.0.1

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• Fixes "Assertion failed" errors when a watcher is closed
• General optimizations

v3.0.0

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Massive CPU & RAM consumption improvements. 17x package & deps size reduction. Node 8+-only

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