[release/3.0] Update dependencies from 3 repositories (#12699)

Update dependencies from https://github.com/aspnet/Blazor build 20190729.2
- Microsoft.AspNetCore.Blazor.Mono - 3.0.0-preview9.19379.2

Add .NET Standard 2.1 workaround (@dougbu)
 - we don't have dotnet/sdk#3463 fix

* Update dependencies from https://github.com/aspnet/AspNetCore-Tooling build 20190731.10
- Microsoft.NET.Sdk.Razor - 5.0.0-alpha1.19381.10
- Microsoft.CodeAnalysis.Razor - 5.0.0-alpha1.19381.10
- Microsoft.AspNetCore.Razor.Language - 5.0.0-alpha1.19381.10
- Microsoft.AspNetCore.Mvc.Razor.Extensions - 5.0.0-alpha1.19381.10

Dependency coherency updates
- Microsoft.Net.Compilers.Toolset - 3.3.0-beta2-19374-05 (parent: Microsoft.Extensions.Logging)

* Update dependencies from https://github.com/aspnet/EntityFrameworkCore build 20190731.15
- Microsoft.EntityFrameworkCore.Tools - 3.0.0-preview9.19381.15
- Microsoft.EntityFrameworkCore.SqlServer - 3.0.0-preview9.19381.15
- dotnet-ef - 3.0.0-preview9.19381.15
- Microsoft.EntityFrameworkCore - 3.0.0-preview9.19381.15
- Microsoft.EntityFrameworkCore.InMemory - 3.0.0-preview9.19381.15
- Microsoft.EntityFrameworkCore.Relational - 3.0.0-preview9.19381.15
- Microsoft.EntityFrameworkCore.Sqlite - 3.0.0-preview9.19381.15

Dependency coherency updates
- Microsoft.AspNetCore.Analyzer.Testing - 3.0.0-preview9.19381.9 (parent: Microsoft.EntityFrameworkCore)
- Microsoft.AspNetCore.BenchmarkRunner.Sources - 3.0.0-preview9.19381.9 (parent: Microsoft.EntityFrameworkCore)
- Microsoft.Extensions.ActivatorUtilities.Sources - 3.0.0-preview9.19381.9 (parent: Microsoft.EntityFrameworkCore)
- Microsoft.Extensions.Caching.Abstractions - 3.0.0-preview9.19381.9 (parent: Microsoft.EntityFrameworkCore)
- Microsoft.Extensions.Caching.Memory - 3.0.0-preview9.19381.9 (parent: Microsoft.EntityFrameworkCore)
- Microsoft.Extensions.Caching.SqlServer - 3.0.0-preview9.19381.9 (parent: Microsoft.EntityFrameworkCore)
- Microsoft.Extensions.Caching.StackExchangeRedis - 3.0.0-preview9.19381.9 (parent: Microsoft.EntityFrameworkCore)
- Microsoft.Extensions.CommandLineUtils.Sources - 3.0.0-preview9.19381.9 (parent: Microsoft.EntityFrameworkCore)
- Microsoft.Extensions.Configuration.Abstractions - 3.0.0-preview9.19381.9 (parent: Microsoft.EntityFrameworkCore)
- Microsoft.Extensions.Configuration.AzureKeyVault - 3.0.0-preview9.19381.9 (parent: Microsoft.EntityFrameworkCore)
- Microsoft.Extensions.Configuration.Binder - 3.0.0-preview9.19381.9 (parent: Microsoft.EntityFrameworkCore)
- Microsoft.Extensions.Configuration.CommandLine - 3.0.0-preview9.19381.9 (parent: Microsoft.EntityFrameworkCore)
- Microsoft.Extensions.Configuration.EnvironmentVariables - 3.0.0-preview9.19381.9 (parent: Microsoft.EntityFrameworkCore)
- Microsoft.Extensions.Configuration.FileExtensions - 3.0.0-preview9.19381.9 (parent: Microsoft.EntityFrameworkCore)
- Microsoft.Extensions.Configuration.Ini - 3.0.0-preview9.19381.9 (parent: Microsoft.EntityFrameworkCore)
- Microsoft.Extensions.Configuration.Json - 3.0.0-preview9.19381.9 (parent: Microsoft.EntityFrameworkCore)
- Microsoft.Extensions.Configuration.KeyPerFile - 3.0.0-preview9.19381.9 (parent: Microsoft.EntityFrameworkCore)
- Microsoft.Extensions.Configuration.UserSecrets - 3.0.0-preview9.19381.9 (parent: Microsoft.EntityFrameworkCore)
- Microsoft.Extensions.Configuration.Xml - 3.0.0-preview9.19381.9 (parent: Microsoft.EntityFrameworkCore)
- Microsoft.Extensions.Configuration - 3.0.0-preview9.19381.9 (parent: Microsoft.EntityFrameworkCore)
- Microsoft.Extensions.DependencyInjection.Abstractions - 3.0.0-preview9.19381.9 (parent: Microsoft.EntityFrameworkCore)
- Microsoft.Extensions.DependencyInjection - 3.0.0-preview9.19381.9 (parent: Microsoft.EntityFrameworkCore)
- Microsoft.Extensions.DiagnosticAdapter - 3.0.0-preview9.19381.9 (parent: Microsoft.EntityFrameworkCore)
- Microsoft.Extensions.Diagnostics.HealthChecks.Abstractions - 3.0.0-preview9.19381.9 (parent: Microsoft.EntityFrameworkCore)
- Microsoft.Extensions.Diagnostics.HealthChecks - 3.0.0-preview9.19381.9 (parent: Microsoft.EntityFrameworkCore)
- Microsoft.Extensions.FileProviders.Abstractions - 3.0.0-preview9.19381.9 (parent: Microsoft.EntityFrameworkCore)
- Microsoft.Extensions.FileProviders.Composite - 3.0.0-preview9.19381.9 (parent: Microsoft.EntityFrameworkCore)
- Microsoft.Extensions.FileProviders.Embedded - 3.0.0-preview9.19381.9 (parent: Microsoft.EntityFrameworkCore)
- Microsoft.Extensions.FileProviders.Physical - 3.0.0-preview9.19381.9 (parent: Microsoft.EntityFrameworkCore)
- Microsoft.Extensions.FileSystemGlobbing - 3.0.0-preview9.19381.9 (parent: Microsoft.EntityFrameworkCore)
- Microsoft.Extensions.HashCodeCombiner.Sources - 3.0.0-preview9.19381.9 (parent: Microsoft.EntityFrameworkCore)
- Microsoft.Extensions.Hosting.Abstractions - 3.0.0-preview9.19381.9 (parent: Microsoft.EntityFrameworkCore)
- Microsoft.Extensions.Hosting - 3.0.0-preview9.19381.9 (parent: Microsoft.EntityFrameworkCore)
- Microsoft.Extensions.HostFactoryResolver.Sources - 3.0.0-preview9.19381.9 (parent: Microsoft.EntityFrameworkCore)
- Microsoft.Extensions.Http - 3.0.0-preview9.19381.9 (parent: Microsoft.EntityFrameworkCore)
- Microsoft.Extensions.Localization.Abstractions - 3.0.0-preview9.19381.9 (parent: Microsoft.EntityFrameworkCore)
- Microsoft.Extensions.Localization - 3.0.0-preview9.19381.9 (parent: Microsoft.EntityFrameworkCore)
- Microsoft.Extensions.Logging.Abstractions - 3.0.0-preview9.19381.9 (parent: Microsoft.EntityFrameworkCore)
- Microsoft.Extensions.Logging.AzureAppServices - 3.0.0-preview9.19381.9 (parent: Microsoft.EntityFrameworkCore)
- Microsoft.Extensions.Logging.Configuration - 3.0.0-preview9.19381.9 (parent: Microsoft.EntityFrameworkCore)
- Microsoft.Extensions.Logging.Console - 3.0.0-preview9.19381.9 (parent: Microsoft.EntityFrameworkCore)
- Microsoft.Extensions.Logging.Debug - 3.0.0-preview9.19381.9 (parent: Microsoft.EntityFrameworkCore)
- Microsoft.Extensions.Logging.EventSource - 3.0.0-preview9.19381.9 (parent: Microsoft.EntityFrameworkCore)
- Microsoft.Extensions.Logging.EventLog - 3.0.0-preview9.19381.9 (parent: Microsoft.EntityFrameworkCore)
- Microsoft.Extensions.Logging.TraceSource - 3.0.0-preview9.19381.9 (parent: Microsoft.EntityFrameworkCore)
- Microsoft.Extensions.Logging.Testing - 3.0.0-preview9.19381.9 (parent: Microsoft.EntityFrameworkCore)
- Microsoft.Extensions.ObjectPool - 3.0.0-preview9.19381.9 (parent: Microsoft.EntityFrameworkCore)
- Microsoft.Extensions.Options.ConfigurationExtensions - 3.0.0-preview9.19381.9 (parent: Microsoft.EntityFrameworkCore)
- Microsoft.Extensions.Options.DataAnnotations - 3.0.0-preview9.19381.9 (parent: Microsoft.EntityFrameworkCore)
- Microsoft.Extensions.Options - 3.0.0-preview9.19381.9 (parent: Microsoft.EntityFrameworkCore)
- Microsoft.Extensions.ParameterDefaultValue.Sources - 3.0.0-preview9.19381.9 (parent: Microsoft.EntityFrameworkCore)
- Microsoft.Extensions.Primitives - 3.0.0-preview9.19381.9 (parent: Microsoft.EntityFrameworkCore)
- Microsoft.Extensions.TypeNameHelper.Sources - 3.0.0-preview9.19381.9 (parent: Microsoft.EntityFrameworkCore)
- Microsoft.Extensions.ValueStopwatch.Sources - 3.0.0-preview9.19381.9 (parent: Microsoft.EntityFrameworkCore)
- Microsoft.Extensions.WebEncoders - 3.0.0-preview9.19381.9 (parent: Microsoft.EntityFrameworkCore)
- Microsoft.Internal.Extensions.Refs - 3.0.0-preview9.19381.9 (parent: Microsoft.EntityFrameworkCore)
- Microsoft.JSInterop - 3.0.0-preview9.19381.9 (parent: Microsoft.EntityFrameworkCore)
- Mono.WebAssembly.Interop - 3.0.0-preview9.19381.9 (parent: Microsoft.EntityFrameworkCore)
- Microsoft.Bcl.AsyncInterfaces - 1.0.0-preview8.19378.8 (parent: Microsoft.NETCore.App.Runtime.win-x64)
- Microsoft.NETCore.App.Runtime.win-x64 - 3.0.0-preview8-28379-05 (parent: Microsoft.Extensions.Logging)
- Microsoft.Extensions.Logging - 3.0.0-preview9.19381.9 (parent: Microsoft.EntityFrameworkCore)
- Microsoft.CSharp - 4.6.0-preview8.19378.8 (parent: Microsoft.NETCore.App.Runtime.win-x64)
- Microsoft.Win32.Registry - 4.6.0-preview8.19378.8 (parent: Microsoft.NETCore.App.Runtime.win-x64)
- Microsoft.Win32.SystemEvents - 4.6.0-preview8.19378.8 (parent: Microsoft.NETCore.App.Runtime.win-x64)
- System.ComponentModel.Annotations - 4.6.0-preview8.19378.8 (parent: Microsoft.NETCore.App.Runtime.win-x64)
- System.Diagnostics.EventLog - 4.6.0-preview8.19378.8 (parent: Microsoft.NETCore.App.Runtime.win-x64)
- System.Drawing.Common - 4.6.0-preview8.19378.8 (parent: Microsoft.NETCore.App.Runtime.win-x64)
- System.IO.Pipelines - 4.6.0-preview8.19378.8 (parent: Microsoft.NETCore.App.Runtime.win-x64)
- System.Net.Http.WinHttpHandler - 4.6.0-preview8.19378.8 (parent: Microsoft.NETCore.App.Runtime.win-x64)
- System.Net.WebSockets.WebSocketProtocol - 4.6.0-preview8.19378.8 (parent: Microsoft.NETCore.App.Runtime.win-x64)
- System.Reflection.Metadata - 1.7.0-preview8.19378.8 (parent: Microsoft.NETCore.App.Runtime.win-x64)
- System.Runtime.CompilerServices.Unsafe - 4.6.0-preview8.19378.8 (parent: Microsoft.NETCore.App.Runtime.win-x64)
- System.Security.Cryptography.Cng - 4.6.0-preview8.19378.8 (parent: Microsoft.NETCore.App.Runtime.win-x64)
- System.Security.Cryptography.Pkcs - 4.6.0-preview8.19378.8 (parent: Microsoft.NETCore.App.Runtime.win-x64)
- System.Security.Cryptography.Xml - 4.6.0-preview8.19378.8 (parent: Microsoft.NETCore.App.Runtime.win-x64)
- System.Security.Permissions - 4.6.0-preview8.19378.8 (parent: Microsoft.NETCore.App.Runtime.win-x64)
- System.Security.Principal.Windows - 4.6.0-preview8.19378.8 (parent: Microsoft.NETCore.App.Runtime.win-x64)
- System.ServiceProcess.ServiceController - 4.6.0-preview8.19378.8 (parent: Microsoft.NETCore.App.Runtime.win-x64)
- System.Text.Encodings.Web - 4.6.0-preview8.19378.8 (parent: Microsoft.NETCore.App.Runtime.win-x64)
- System.Text.Json - 4.6.0-preview8.19378.8 (parent: Microsoft.NETCore.App.Runtime.win-x64)
- System.Threading.Channels - 4.6.0-preview8.19378.8 (parent: Microsoft.NETCore.App.Runtime.win-x64)
- System.Windows.Extensions - 4.6.0-preview8.19378.8 (parent: Microsoft.NETCore.App.Runtime.win-x64)
- Microsoft.Extensions.DependencyModel - 3.0.0-preview8-28379-05 (parent: Microsoft.Extensions.Logging)
- Microsoft.NETCore.App.Ref - 3.0.0-preview8-28379-05 (parent: Microsoft.Extensions.Logging)
- NETStandard.Library.Ref - 2.1.0-preview8-28379-05 (parent: Microsoft.Extensions.Logging)
- Microsoft.NETCore.Platforms - 3.0.0-preview8.19378.8 (parent: Microsoft.NETCore.App.Runtime.win-x64)
- Internal.AspNetCore.Analyzers - 3.0.0-preview9.19381.9 (parent: Microsoft.EntityFrameworkCore)
- Microsoft.AspNetCore.Testing - 3.0.0-preview9.19381.9 (parent: Microsoft.EntityFrameworkCore)
- Microsoft.Net.Compilers.Toolset - 3.3.0-beta2-19381-04 (parent: Microsoft.Extensions.Logging)