Added .NET 5 build targets

[JSkimming]

No description provided.

[codecov]

Codecov Report

Merging #114 (6cf55c1) into master (ecab4f4) will not change coverage.
The diff coverage is 100.00%.

@@            Coverage Diff            @@
##            master      #114   +/-   ##
=========================================
  Coverage   100.00%   100.00%           
=========================================
  Files            5         5           
  Lines          220       220           
=========================================
  Hits           220       220           

Impacted Files	Coverage Δ
...stle.Core.AsyncInterceptor/AsyncInterceptorBase.cs	100.00% <ø> (ø)
...le.Core.AsyncInterceptor/AsyncTimingInterceptor.cs	100.00% <100.00%> (ø)

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[coveralls]

Pull Request Test Coverage Report for Build 406709150

• 2 of 2 (100.0%) changed or added relevant lines in 1 file 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 405618041:	0.0%
Covered Lines:	220
Relevant Lines:	220

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💛 - Coveralls