Fix http 2 for .Net 5.0

[JeremyTCD]

No description provided.

[codecov]

Codecov Report

Merging #100 (90c98c4) into master (3d3a0f8) will increase coverage by 0.01%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##           master     #100      +/-   ##
==========================================
+ Coverage   97.04%   97.05%   +0.01%     
==========================================
  Files          24       24              
  Lines         812      815       +3     
==========================================
+ Hits          788      791       +3     
  Misses         24       24              

Impacted Files	Coverage Δ
src/NodeJS/NodeJSServiceCollectionExtensions.cs	100.00% <ø> (ø)
...ementations/OutOfProcess/Http/HttpNodeJSService.cs	97.56% <100.00%> (+0.09%)	⬆️
...ementations/OutOfProcess/Http/InvocationContent.cs	100.00% <100.00%> (ø)
src/NodeJS/StaticNodeJSService.cs	100.00% <100.00%> (ø)
src/NodeJS/Utils/JsonService.cs	100.00% <100.00%> (ø)

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