⬆️ Update dependency typescript to v3.1.6

[renovate]

This PR contains the following updates:

Package	Type	Update	Change	References
typescript	devDependencies	patch	3.1.5 -> 3.1.6	homepage, source

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Release Notes

Microsoft/TypeScript

v3.1.6

Compare Source

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[codecov]

Codecov Report

Merging #2 into master will not change coverage.
The diff coverage is n/a.

@@          Coverage Diff          @@
##           master     #2   +/-   ##
=====================================
  Coverage     100%   100%           
=====================================
  Files           1      1           
  Lines           9      9           
  Branches        1      1           
=====================================
  Hits            9      9

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