Update dependency @types/jest to v26.0.23

[renovate]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
@types/jest	26.0.20 -> 26.0.23

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[coveralls]

Pull Request Test Coverage Report for Build 820670974

• 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 100.0%

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Totals
Change from base Build 742597458:	0.0%
Covered Lines:	232
Relevant Lines:	232

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💛 - Coveralls

[codecov]

Codecov Report

Merging #230 (e4d77c8) into master (a63552e) will not change coverage.
The diff coverage is n/a.

@@            Coverage Diff            @@
##            master      #230   +/-   ##
=========================================
  Coverage   100.00%   100.00%           
=========================================
  Files           10        10           
  Lines          242       242           
  Branches        46        39    -7     
=========================================
  Hits           242       242           

Flag	Coverage Δ
unittests	100.00% <ø> (ø)

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