Merge pull request dotnet#3755 from JoeRobich/update-omnisharp-1.35.1

Update to OmniSharp 1.35.1

Merge pull request dotnet#3717 from JoeRobich/update-omnisharp-1.35.0

Update to OmniSharp 1.35.0

Merge pull request dotnet#3691 from JoeRobich/update-omnisharp-1.34.15

Update OmniSharp to 1.34.15

Remove unused import

Merge pull request dotnet#3648 from JoeRobich/update-omnisharp-1.34.14

Update OmniSharp to 1.34.14

Update version and changelog for 1.21.13 (dotnet#3610)

* Update version and changelog for 1.21.13

* Update other occurences of ms-vscode

Merge pull request dotnet#3587 from JoeRobich/update-omnisharp-1.34.13

Update OmniSharp to 1.34.13

Merge pull request dotnet#3554 from JoeRobich/update-omnisharp-1.34.11

Update OmniSharp to 1.34.11

Merge pull request dotnet#3528 from JoeRobich/update-omnisharp-1.34.10

Update OmniSharp to 1.34.10

Merge pull request dotnet#3460 from OmniSharp/nimullen/razor.insiders…

….fix

Fix Razor completion in VSCode-Insiders.