chore(deps): update dependency typescript to v4

[renovate]

This PR contains the following updates:

Package	Type	Update	Change
typescript (source)	devDependencies	major	~3.9.0 -> ~4.0.0

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Release Notes

Microsoft/TypeScript

v4.0.2

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 v4.0.0 (Beta).
• fixed issues query for Typescript v4.0.1 (RC).
• fixed issues query for Typescript v4.0.2.

Downloads are available on:

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

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[codecov]

Codecov Report

Merging #314 into master will not change coverage.
The diff coverage is n/a.

@@            Coverage Diff            @@
##            master      #314   +/-   ##
=========================================
  Coverage   100.00%   100.00%           
=========================================
  Files            6         6           
  Lines          157       156    -1     
  Branches        14        14           
=========================================
- Hits           157       156    -1     

Impacted Files	Coverage Δ
src/components/commit.tsx	100.00% <0.00%> (ø)