chore(deps): update dependency typescript to v3.9.7

[renovate]

This PR contains the following updates:

Package	Type	Update	Change
typescript (source)	devDependencies	patch	3.9.6 -> 3.9.7

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Release Notes

Microsoft/TypeScript

v3.9.7

Compare Source

For release notes, check out the release announcement.

For the complete list of fixed issues, check out the

• fixed issues query for Typescript v3.9.0 (Beta).
• fixed issues query for Typescript v3.9.1 (RC).
• fixed issues query for Typescript v3.9.2 (Final).
• fixed issues query for Typescript v3.9.3 (patch release).
• fixed issues query for Typescript v3.9.5 (patch release).
• fixed issues query for Typescript v3.9.6 (patch release).
• fixed issues query for Typescript v3.9.7 (patch release).

(note, 3.9.4 was intentionally skipped due to minor complications in publishing)

Downloads are available on:

• npm
• Visual Studio 2017/2019 (Select new version in project options)
• NuGet package

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[coveralls]

Pull Request Test Coverage Report for Build 171839780

• 0 of 0 changed or added relevant lines in 0 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage remained the same at 78.459%

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Totals
Change from base Build 171171398:	0.0%
Covered Lines:	366
Relevant Lines:	437

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💛 - Coveralls