Suppress compile warnings

[AArnott]

No description provided.

[codecov-io]

Codecov Report

Merging #438 into master will increase coverage by 0.05%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master     #438      +/-   ##
==========================================
+ Coverage   90.52%   90.58%   +0.05%     
==========================================
  Files          49       49              
  Lines        3727     3728       +1     
==========================================
+ Hits         3374     3377       +3     
+ Misses        353      351       -2     

Impacted Files	Coverage Δ
src/StreamJsonRpc/MessagePackFormatter.cs	93.91% <ø> (ø)
src/StreamJsonRpc/JsonRpcExtensions.cs	100.00% <0.00%> (ø)
src/StreamJsonRpc/JsonMessageFormatter.cs	92.85% <0.00%> (ø)
src/StreamJsonRpc/Reflection/CodeGenHelpers.cs	100.00% <0.00%> (ø)
...pc/Reflection/MessageFormatterEnumerableTracker.cs	96.22% <0.00%> (ø)
src/StreamJsonRpc/HeaderDelimitedMessageHandler.cs	86.04% <0.00%> (+0.08%)	⬆️
src/StreamJsonRpc/JsonRpc.cs	93.05% <0.00%> (+0.11%)	⬆️
src/StreamJsonRpc/MessageHandlerBase.cs	100.00% <0.00%> (+1.26%)	⬆️

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