Update dependency yargs to v15

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This PR contains the following updates:

Package	Type	Update	Change
yargs (source)	dependencies	major	12.0.1 -> 15.0.1

By merging this PR, the below vulnerabilities will be automatically resolved:

	Severity	CVSS Score	CVE
	High	7.5	CVE-2021-3807
	High	7.3	CVE-2020-7774
	Medium	5.3	CVE-2020-7608
	Medium	5.1	WS-2019-0307

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Release Notes

yargs/yargs

v15.0.1

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Bug Fixes

• deps: cliui, find-up, and string-width, all drop Node 6 support (#​1479) (6a9ebe2)

v15.0.0

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⚠ BREAKING CHANGES

• deps: yargs-parser now throws on invalid combinations of config (#​1470)
• [email protected] drops support for Node 6
• drop Node 6 support (#​1461)
• remove package.json-based parserConfiguration (#​1460)

Features

• deps: yargs-parser now throws on invalid combinations of config (#​1470) (c10c38c)
• expose Parser from require('yargs/yargs') (#​1477) (1840ba2)

Bug Fixes

• docs: TypeScript import to prevent a future major release warning (#​1441) (b1b156a)
• stop-parse was not being respected by commands (#​1459) (12c82e6)
• update to yargs-parser with fix for array default values (#​1463) (ebee59d)
• docs: update boolean description and examples in docs (#​1474) (afd5b48)

Miscellaneous Chores

• drop Node 6 support (#​1461) (2ba8ce0)

Code Refactoring

• remove package.json-based parserConfiguration (#​1460) (0d3642b)

v14.2.3

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v14.2.2

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v14.2.1

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v14.2.0

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v14.1.0

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v14.0.0

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v13.3.2

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v13.3.0

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Bug Fixes

• deps: yargs-parser update addressing several parsing bugs (#​1357) (e230d5b)

Features

• i18n: swap out os-locale dependency for simple inline implementation (#​1356) (4dfa19b)
• support defaultDescription for positional arguments (812048c)

v13.2.4

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v13.2.2

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v13.2.1

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v13.2.0

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v13.1.0

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v12.0.5

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v12.0.4

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v12.0.2

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