fix(deps): update dependency yargs to v12

[renovate]

This PR contains the following updates:

Package	Type	Update	Change	References
yargs	dependencies	major	^11.1.0 -> ^12.0.0	homepage, source

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Release Notes

yargs/yargs

v12.0.5

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Bug Fixes

• allows camel-case, variadic arguments, and strict mode to be combined (#​1247) (eacc035)

v12.0.4

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Bug Fixes

• allows camel-case, variadic arguments, and strict mode to be combined (#​1247) (eacc035)

v12.0.2

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Bug Fixes

• $0 contains first arg in bundled electron apps (#​1206) (567820b)
• accept single function for middleware (66fd6f7), closes #​1214 #​1214
• hide hidden options from help output even if they are in a group (#​1221) (da54028)
• improve Norwegian Bokmål translations (#​1208) (a458fa4)
• improve Norwegian Nynorsk translations (#​1207) (d422eb5)

v12.0.1

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Bug Fixes

• middleware should work regardless of when method is called (664b265), closes #​1178
• translation not working when using __ with a single parameter (#​1183) (f449aea)
• upgrade os-locale to version that addresses license issue (#​1195) (efc0970)

v12.0.0

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Bug Fixes

• .argv and .parse() now invoke identical code path (#​1126) (f13ebf4)
• remove the trailing white spaces from the help output (#​1090) (3f0746c)
• completion: Avoid default command and recommendations during completion (#​1123) (036e7c5)

Chores

• test Node.js 6, 8 and 10 (#​1160) (84f9d2b)
• upgrade to version of yargs-parser that does not populate value for unset boolean (#​1104) (d4705f4)

Features

• add support for global middleware, useful for shared tasks like metrics (#​1119) (9d71ac7)
• allow setting scriptName $0 (#​1143) (a2f2eae)
• remove setPlaceholderKeys (#​1105) (6ee2c82)

BREAKING CHANGES

• Options absent from argv (not set via CLI argument) are now absent from the parsed result object rather than being set with undefined
• drop Node 4 from testing matrix, such that we'll gradually start drifting away from supporting Node 4.
• yargs-parser does not populate 'false' when boolean flag is not passed
• tests that assert against help output will need to be updated

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[svrooij]

🎉 This PR is included in version 1.5.1 🎉

The release is available on:

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