Update dependency finalhandler to v2

[renovate]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
finalhandler	1.3.1 -> 2.1.0

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Release Notes

pillarjs/finalhandler (finalhandler)

v2.1.0

Compare Source

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• deps:
  • use caret notation for dependency versions
  • encodeurl@^2.0.0
  • debug@^4.4.0
• remove ServerResponse.headersSent support check
• remove setImmediate support check
• update test dependencies
• remove unnecessary devDependency safe-buffer
• remove unpipe package and use native unpipe() method
• remove unnecessary devDependency readable-stream
• refactor: use object spread to copy error headers
• refactor: use replaceAll instead of replace with a regex
• refactor: replace setHeaders function with optimized inline header setting

v2.0.0

Compare Source

==================

• drop support for node <18
• ignore status message for HTTP/2 (#​53)

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