Better preserve newlines between statements when removing an unused variable

Fix switches on creating dump files when VS instance crashes or hangs (integration tests)

Include impl assemblies in debugger packages

Teach pattern-matching analyzer to detect and fix additional cases

Use the live PublishData.json file

Fix NuGet warnings

The most recent preview of 15.3 introduced a number of NuGet warnings
into our build. Most of these were due to new dependencies in the
service hub layer. This change fixes these warnings by moving to a new
version of StreamJsonRpc and adding new PackageReferences as dictated by
the warnings

Relevant links:

- https://github.com/NuGet/Home/issues/5633
- https://github.com/NuGet/Home/wiki/Warnings-and-Errors-Combined-Specs

- null check in `while` in addition to `if`
- inline type check e.g. `if ((o as T) != null)`

Merge dev15.3.x to master

Fixed 'Generate Constructor' refactoring for an abstract class.

Fixed incorrect offer to interpolate string if used string.Format with named arguments.

Fixed Make Method Asynchronous refactoring.

Fixed IntelliSense suggestion on typing dot after method group

Build locally with toolset 2.3.1

Use default tuple fields in deconstruction since fields from inferred names are marked not usable in C#7

Fixes #51051

Fixes #21050

Enable analyzers on Roslyn.sln except for two very slow ones

Add Shared attributes to code fix providers

Offer to not generate fields when generating a new constructor.

Add feature to convert from ReferenceEquals to 'is null'

Update Integration tests utility to support Unload/Reload project and nuget restore

Throw early if an invalid buffer is passed to ISuggestedActionsSource

The inherited "Warning" severity will result in error reports on CI builds
due to the use of TreatWarningsAsErrors.

Use default tuple fields in deconstruction since fields from inferred names are marked not usable in C#7

Launch settings for test projects

Disable analyzers on developer builds

Use ConfigureAwait

This file only has meaning in our master branch. Hence change our
publish script to consult that version, not the one checked into the
current branch.

Restructure how assets are published

A recent change to enable analyzers caused a 3-6X build slow down.
Disabling them locally at least until we can track this down.

https://github.com/dotnet/roslyn/issues/21041

Update Debugger nuspecs