Update dependency dotenv to v16.4.5

[renovate]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
dotenv	16.4.1 -> 16.4.5

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Release Notes

motdotla/dotenv (dotenv)

v16.4.5

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Changed

• 🐞 fix recent regression when using path option. return to historical behavior: do not attempt to auto find .env if path set. (regression was introduced in 16.4.3) #​814

v16.4.4

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Changed

• 🐞 Replaced chaining operator ?. with old school && (fixing node 12 failures) #​812

v16.4.3

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Changed

• Fixed processing of multiple files in options.path #​805

v16.4.2

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Changed

• Changed funding link in package.json to dotenvx.com

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