Update dependency dotenv to v12

[renovate[bot]]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
dotenv	^11.0.0 -> ^12.0.0

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Release Notes

motdotla/dotenv

### [`v12.0.0`](https://togithub.com/motdotla/dotenv/blob/HEAD/CHANGELOG.md#​1200-httpsgithubcommotdotladotenvcomparev1100v1200-2022-01-15) [Compare Source](https://togithub.com/motdotla/dotenv/compare/v11.0.0...v12.0.0) ##### Removed - *Breaking:* drop support for Flow static type checker ([#​584](https://togithub.com/motdotla/dotenv/pull/584)) ##### Changed - Move types/index.d.ts to lib/main.d.ts ([#​585](https://togithub.com/motdotla/dotenv/pull/585)) - Typescript cleanup ([#​587](https://togithub.com/motdotla/dotenv/pull/587)) - Explicit typescript inclusion in package.json ([#​566](https://togithub.com/motdotla/dotenv/pull/566))

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[codecov[bot]]

Codecov Report

Merging #231 (4819eba) into master (af045db) will not change coverage. The diff coverage is n/a.

@@           Coverage Diff           @@
##           master     #231   +/-   ##
=======================================
  Coverage   91.66%   91.66%           
=======================================
  Files           7        7           
  Lines         144      144           
  Branches       39       39           
=======================================
  Hits          132      132           
  Misses         12       12           

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