chore(deps): update dependency pify to v5

[renovate]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
pify	^2.3.0 -> ^5.0.0

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Release Notes

sindresorhus/pify

v5.0.0

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Breaking

• Require Node.js 10 a6c20b3

Enhancements

• Implement using Proxy (#​73) 57e9a04
  This means that it should work seamlessly in more cases as the promisified function is just a transparent wrapper around the original function.

v4.0.1

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• Bring back support for promisifying prototype functions. It was accidentally left out in v4. bbe89b7

v4.0.0

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Breaking:

• Require Node.js 6. 523bad9

Other:

• Check for invalid input. 9ef944c

v3.0.0

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• Now requires Node.js 4.
• Made multiArgs option apply on rejections too. 30116d9
• Moved promiseModule argument into an option. 5f7259c
• Supports transforming inherited methods and bind methods to original object. 1701541
• Added option to support non-error-first APIs. fad7b3d
• Excludes methods ending in Stream by default. a2cec4c

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