chore(deps): update dependency gts to v6

[renovate-bot]

This PR contains the following updates:

Package	Change	Age	Confidence
gts	^5.0.0 -> ^6.0.0

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Release Notes

google/gts (gts)

v6.0.2

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Bug Fixes

• TS lib Support for Node 18+ (#​913) (82aa8e3)

v6.0.1

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Bug Fixes

• Allow typescript v5+ as a peer dependency (#​909) (996aaec)

v6.0.0

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⚠ BREAKING CHANGES

• Update '.prettierrc.json' to include trailingComma: "all" to match internal Google config (#​822)
• Update typescript and other dependencies (#​902)
• Set no-floating-promises to error (#​901)
• Set composite: true in tsconfig-google.json (#​899)
• Set stripInternal in tsconfig-google.json (#​900)
• Support Node 18+ (#​896)

Features

• Set composite: true in tsconfig-google.json (#​899) (71972dc)
• Set no-floating-promises to error (#​901) (1d28f92)
• Set stripInternal in tsconfig-google.json (#​900) (9b37243)
• Support Node 18+ (#​896) (f011fa3)
• Update '.prettierrc.json' to include trailingComma: "all" to match internal Google config (#​822) (27d0d93)
• Update typescript and other dependencies (#​902) (1c18b3a)

Bug Fixes

• deps: update dependency eslint to v8.57.1 (#​903) (23da8ef)
• deps: update dependency eslint-plugin-prettier to v5.2.1 (#​894) (a6d5e6a)
• deps: update dependency prettier to v3.3.3 (#​883) (52dca7c)

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