chore(deps): replace dependency @tsconfig/node12 with @tsconfig/node14

[renovate]

This PR contains the following updates:

Package	Type	Update	Change
@tsconfig/node12 (source) → @tsconfig/node14	devDependencies	replacement	^12.1.7 → ^14.1.0

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This is a special PR that replaces @tsconfig/node12 with the community suggested minimal stable replacement version.

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[jonmattgray]

removed use of @tsconfig/node12 package for base tsconfig because we don't use it in any of our other TS repos