Fixed issue in when partial item handler would not return results correctly

[david-driscoll]

No description provided.

[codecov]

Codecov Report

Merging #275 into master will decrease coverage by 0.03%.
The diff coverage is 0.00%.

@@            Coverage Diff             @@
##           master     #275      +/-   ##
==========================================
- Coverage   64.36%   64.33%   -0.04%     
==========================================
  Files         376      376              
  Lines       12423    12423              
  Branches     1429     1429              
==========================================
- Hits         7996     7992       -4     
- Misses       3954     3961       +7     
+ Partials      473      470       -3     

Impacted Files	Coverage Δ
src/Protocol/DelegatingHandlers.cs	32.73% <0.00%> (+0.89%)	⬆️
src/JsonRpc/Server/Messages/ParseError.cs	0.00% <0.00%> (-100.00%)	⬇️
src/JsonRpc/InputHandler.cs	86.73% <0.00%> (-1.97%)	⬇️
src/Server/LanguageServer.Shutdown.cs	75.86% <0.00%> (ø)
src/Protocol/Document/ICodeLensHandler.cs	90.66% <0.00%> (+0.38%)	⬆️
src/Protocol/Progress/ProgressManager.cs	43.44% <0.00%> (+0.81%)	⬆️

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