We have seen two big analyzer packages (CodeCracker and RefactoringEssentials) end up with registering async actions, which can crash VS from the async continuations.
See [this](https://github.com/code-cracker/code-cracker/issues/375#issue-87474837) for more details. Now we prevent this by disallowing analyzers to register async callbacks.

Fixes https://github.com/dotnet/roslyn/issues/13120

Remove `replace` references: IDS_FeatureReplace and SyntaxModifiers.Replace

Add InternalsVisibleTo for MonoDevelop

Small clean up: remove unnecessary #ifs, usings, whitespace

added solution checksum updating service

Updating the build property from 'VisualStudioInstallDirectoryFromRegistry' to 'IsDev15BeforePreview4'

Fix #12818

* CommonPEModuleBuilder refactoring

* Renames

* Use CommonPEModuleBuilder instead of IModule

* Remove IModule

* Move GetFiles to module builder

* Remove IAssembly

* Add comments, PR feedback

* Resolve merge conflicts

Use ByPass to run Powershell

reduced a bit more allocations

Updating the build property from 'VisualStudioInstallDirectoryFromRegistry' to 'IsDev15BeforePreview4'

Make IDkm* stub interfaces internal...

Report errors for new features unsupported in expression trees.

These are not intended to be public APIs at this point (they'll eventually
be added to Concord as public APIs).

Add support for embedding C# source in portable pdb

Updating Roslyn to consume the Preview4 VSSDK packages.

Don't run VB enum completion after dot

Commit C# completion on colon

Add parsing of NuGet.Config files to RepoUtil and other work.

Members after dot are now provided by SymbolCompletionProvider. Fixes

Unwrap arrays when determining whether to show the builder for lambda
expressions.

Use nuget restore to determine the exact dependencies we need to insert into VS.

Conflicts:
 src/Workspaces/Core/Portable/WorkspacesResources.resx

Handle pointer and error types in NormalizeTaskTypes