chore(deps): update dependency tslib to v2.8.1

[renovate]

This PR contains the following updates:

Package	Change	Age	Confidence
tslib (source)	2.7.0 -> 2.8.1

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Release Notes

Microsoft/tslib (tslib)

v2.8.1

Compare Source

What's Changed

• Fix publish workflow by @​andrewbranch in microsoft#271
• Include non-enumerable keys in __importStar helper by @​rbuckton in microsoft#272
• Remove use of ES2015 syntax by @​andrewbranch in microsoft#275

Full Changelog: microsoft/tslib@v2.8.0...v2.8.1

v2.8.0

Compare Source

What's Changed

• Validate export structure of every entrypoint by @​andrewbranch in microsoft#269
• Add rewriteRelativeImportExtension helper by @​andrewbranch in microsoft#270

Full Changelog: microsoft/tslib@v2.7.0...v2.8.0

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