Merge dev16.0 to master

* Update dependencies from https://github.com/dotnet/arcade build 20190116.1

This change updates the following dependencies
- Microsoft.DotNet.Arcade.Sdk - 1.0.0-beta.19066.1

* Update dependencies from https://github.com/dotnet/arcade build 20190117.6

This change updates the following dependencies
- Microsoft.DotNet.Arcade.Sdk - 1.0.0-beta.19067.6

* Update dependencies from https://github.com/dotnet/arcade build 20190118.4

This change updates the following dependencies
- Microsoft.DotNet.Arcade.Sdk - 1.0.0-beta.19068.4

* Update dependencies from https://github.com/dotnet/arcade build 20190119.2

This change updates the following dependencies
- Microsoft.DotNet.Arcade.Sdk - 1.0.0-beta.19069.2

* Update dependencies from https://github.com/dotnet/arcade build 20190120.2

This change updates the following dependencies
- Microsoft.DotNet.Arcade.Sdk - 1.0.0-beta.19070.2

* Update dependencies from https://github.com/dotnet/arcade build 20190122.5

This change updates the following dependencies
- Microsoft.DotNet.Arcade.Sdk - 1.0.0-beta.19072.5

* Update dependencies from https://github.com/dotnet/arcade build 20190123.5

This change updates the following dependencies
- Microsoft.DotNet.Arcade.Sdk - 1.0.0-beta.19073.5

* Update dependencies from https://github.com/dotnet/arcade build 20190130.6

This change updates the following dependencies
- Microsoft.DotNet.Arcade.Sdk - 1.0.0-beta.19080.6

* Update dependencies from https://github.com/dotnet/arcade build 20190131.3

This change updates the following dependencies
- Microsoft.DotNet.Arcade.Sdk - 1.0.0-beta.19081.3

* Update dependencies from https://github.com/dotnet/arcade build 20190201.16

This change updates the following dependencies
- Microsoft.DotNet.Arcade.Sdk - 1.0.0-beta.19101.16

* Update dependencies from https://github.com/dotnet/arcade build 20190202.1

This change updates the following dependencies
- Microsoft.DotNet.Arcade.Sdk - 1.0.0-beta.19102.1

* Update dependencies from https://github.com/dotnet/arcade build 20190203.1

This change updates the following dependencies
- Microsoft.DotNet.Arcade.Sdk - 1.0.0-beta.19103.1

* Update dependencies from https://github.com/dotnet/arcade build 20190204.18

This change updates the following dependencies
- Microsoft.DotNet.Arcade.Sdk - 1.0.0-beta.19104.18

* Update dependencies from https://github.com/dotnet/arcade build 20190205.5

This change updates the following dependencies
- Microsoft.DotNet.Arcade.Sdk - 1.0.0-beta.19105.5

* Update dependencies from https://github.com/dotnet/arcade build 20190206.4

This change updates the following dependencies
- Microsoft.DotNet.Arcade.Sdk - 1.0.0-beta.19106.4

* Update dependencies from https://github.com/dotnet/arcade build 20190207.1

This change updates the following dependencies
- Microsoft.DotNet.Arcade.Sdk - 1.0.0-beta.19107.1

* Update dependencies from https://github.com/dotnet/arcade build 20190208.1

This change updates the following dependencies
- Microsoft.DotNet.Arcade.Sdk - 1.0.0-beta.19108.1

* Update dependencies from https://github.com/dotnet/arcade build 20190212.3

This change updates the following dependencies
- Microsoft.DotNet.Arcade.Sdk - 1.0.0-beta.19112.3

* Update dependencies from https://github.com/dotnet/arcade build 20190213.1

This change updates the following dependencies
- Microsoft.DotNet.Arcade.Sdk - 1.0.0-beta.19113.1

* Update dependencies from https://github.com/dotnet/arcade build 20190214.4

This change updates the following dependencies
- Microsoft.DotNet.Arcade.Sdk - 1.0.0-beta.19114.4

* Update dependencies from https://github.com/dotnet/arcade build 20190215.1

This change updates the following dependencies
- Microsoft.DotNet.Arcade.Sdk - 1.0.0-beta.19115.1

* Update dependencies from https://github.com/dotnet/arcade build 20190219.2

This change updates the following dependencies
- Microsoft.DotNet.Arcade.Sdk - 1.0.0-beta.19119.2

* Update dependencies from https://github.com/dotnet/arcade build 20190221.1

This change updates the following dependencies
- Microsoft.DotNet.Arcade.Sdk - 1.0.0-beta.19121.1

* Update dependencies from https://github.com/dotnet/arcade build 20190221.5

This change updates the following dependencies
- Microsoft.DotNet.Arcade.Sdk - 1.0.0-beta.19121.5

* Update dependencies from https://github.com/dotnet/arcade build 20190222.3

This change updates the following dependencies
- Microsoft.DotNet.Arcade.Sdk - 1.0.0-beta.19122.3

* Update dependencies from https://github.com/dotnet/arcade build 20190223.1

This change updates the following dependencies
- Microsoft.DotNet.Arcade.Sdk - 1.0.0-beta.19123.1

* Update dependencies from https://github.com/dotnet/arcade build 20190224.1

This change updates the following dependencies
- Microsoft.DotNet.Arcade.Sdk - 1.0.0-beta.19124.1

* Update dependencies from https://github.com/dotnet/arcade build 20190225.2

This change updates the following dependencies
- Microsoft.DotNet.Arcade.Sdk - 1.0.0-beta.19125.2

* Update dependencies from https://github.com/dotnet/arcade build 20190226.6

This change updates the following dependencies
- Microsoft.DotNet.Arcade.Sdk - 1.0.0-beta.19126.6

import the base type to work around breaking change

* Exposes additional compilation options to the scripting API

Closes #32667

* Accordingly to the PR review

Remove empty lines.
Add OptimizationLevel to the VisualBasicCompilationOptions.
Add tests that ensures ScriptOptions are applied to the compilation.

Regex completion (no completion-suffix work)

Documentation for Ranges returns a 404

* Add reproducer for #33388

* Skip normalizing task types if binding attribute arguments

* Use InAttributeArgument property

* Add test where task-like normalization affects overload resolution

* Update AttributeArgument_TaskLikeOverloadResolution test case

* Add assert and remove apparently unused branch

* Add back comparison of remaining parameter types with InAttributeArgument guard

* Update comment on remaining parameter comparisons

* Add comment describing why we don't normalize task types in attribute arguments

* Store nullable attribute constructor params in a field:
- Add a derived nullable attribute symbol
- Add a constructor symbol that allows assignment to a field
- Generate the appropriate constructors for byte and byte[] versions of the attribute
- Add tests

* Fixes 14077

* Respond to feedback

* More tests

* Add FallbackNamingRule for parameters

* Fix default parameter naming rule

* Use parameter naming style, add tests

* Add a synced use enhanced color checkbox to C# and Basic advanced options.

* Use optionstore in DiagnosticWindow option pages

* Add option search keywords for enhanced color option

Add various bits of telemetry around DocumentClosed handling

Miscellaneous workspace cleanup

Use a pair of lock files instead of an interprocess named mutex on Mono because the latter is not implemented

Create single NuPkg for the entire compiler toolset

Code wrapping refactorings should be lower pri than other refactorings

Also re-enable docker caching

Merge dev16.0 to master