chore(deps): update dependency manten to v2

[renovate]

This PR contains the following updates:

Package	Change	Age	Confidence
manten	^1.5.0 → ^2.0.0

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Release Notes

privatenumber/manten (manten)

v2.0.0

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Bug Fixes

• add update hint to snapshot mismatch error (2649084)

Features

• add agent SKILL (a8ad89d)
• drop CommonJS support, ESM-only package (0aa153a)
• raise minimum Node.js version to 20.20.0 (03eae4e)
• use AsyncLocalStorage for implicit context (d28f795)

BREAKING CHANGES

• CommonJS require('manten') is no longer supported. Use ESM import instead.
• All APIs are now standalone imports. Callbacks no longer receive test, describe, onFinish, skip, onTestFail, onTestFinish, or expectSnapshot. testSuite and runTestSuite are removed.
• minimum Node.js version raised from 18.17.0 to 20.20.0

v1.10.0

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Features

• add expectSnapshot API for snapshot testing (fd324ca)
• log when TESTONLY is set (8eb703b)

v1.9.0

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Features

• add dynamic skip support for tests and describes (#​17) (ee02bea)

v1.8.0

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Features

• add AbortSignal to test callback for timeout cleanup (26ed26f)
• describe: add timeout option and setProcessTimeout (538e81e)

v1.7.0

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Features

• log timestamp for test result (224e1f3)

v1.6.0

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Bug Fixes

• prevent crash when all tests are pending and add matcherResult assertion (72d87b4)

Features

• add optional name parameter to testSuite (5d3d093)
• describe: add parallel option for test concurrency (cef0729)
• upgrade dependencies (5a86a6d)

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