Fix all providers support

[savpek]

Vscode implementation for OmniSharp/omnisharp-roslyn#1581

Todo:

• Tests (once omnisharp-roslyn side is available for CI builds)
• Refactor copy-paste code from service as common base or something.

Supports:

• Fix one category (by ID) to fix in document, project and solution scope.
• Fix all autofixable issues in document scope.
• Fix all issues in current document on save.

Document scope

Project scope

Solution scope:

Fix all issues on document when saved at vscode:

[codecov]

Codecov Report

Merging #3440 into master will increase coverage by 0.04%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##           master    #3440      +/-   ##
==========================================
+ Coverage   85.93%   85.97%   +0.04%     
==========================================
  Files          60       60              
  Lines        1848     1854       +6     
  Branches      215      215              
==========================================
+ Hits         1588     1594       +6     
  Misses        200      200              
  Partials       60       60              

Flag	Coverage Δ
#integration	100.00% <ø> (ø)
#unit	85.97% <100.00%> (+0.04%)	⬆️

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
src/omnisharp/protocol.ts	79.13% <100.00%> (+0.94%)	⬆️

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[JoeRobich]

Updating OmniSharp to include the server-side changes in #3960

[JoeRobich]

@savpek Is this ready to go in? GitHub checks didn't update. CI is passing https://travis-ci.org/github/OmniSharp/omnisharp-vscode/builds/716733951

[savpek]

@savpek Is this ready to go in? GitHub checks didn't update. CI is passing https://travis-ci.org/github/OmniSharp/omnisharp-vscode/builds/716733951

I think it is. It's quite a while when i wrote this but based on code it should do 🤔

[JoeRobich]

The release of 3.1.401 SDK broke our CI. Fixed by specifying to install 3.1.302. Hopefully this run will pass and we'll merge

[JoeRobich]

Passing CI - https://travis-ci.org/github/OmniSharp/omnisharp-vscode/builds/717111983