Change scripts to use yarn instead of npm

[surilindur]

Here is a small set of changes to:

• Change the scripts in package.json files to use yarn instead of npm (except the publish script)
• Add packageManager field to package.json at workspace root
• Replace pre-commit with husky because pre-commit assumes the NPM CLI is available

[coveralls]

Pull Request Test Coverage Report for Build 8831832815

Details

• 0 of 0 changed or added relevant lines in 0 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage remained the same at 100.0%

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Totals
Change from base Build 8665389691:	0.0%
Covered Lines:	17
Relevant Lines:	17

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💛 - Coveralls

[rubensworks]

🚀