update: update dependency @microsoft/api-documenter to v7.9.9

[renovate]

This PR contains the following updates:

Package	Type	Update	Change
@microsoft/api-documenter (source)	devDependencies	patch	7.9.8 -> 7.9.9

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[codeclimate]

Code Climate has analyzed commit 42a8d1e and detected 0 issues on this pull request.

The test coverage on the diff in this pull request is 100.0% (95% is the threshold).

This pull request will bring the total coverage in the repository to 100.0% (0.0% change).

View more on Code Climate.

[codecov]

Codecov Report

Merging #556 into master will not change coverage.
The diff coverage is n/a.

@@            Coverage Diff            @@
##            master      #556   +/-   ##
=========================================
  Coverage   100.00%   100.00%           
=========================================
  Files           20        20           
  Lines          230       230           
  Branches        39        39           
=========================================
  Hits           230       230           

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