Update dependencies from https://github.com/dotnet/arcade build 20210…

…526.5 (dotnet#839)

[main] Update dependencies from dotnet/arcade

Merge pull request dotnet#566 from sharwell/dependencies

Fix resolution of source generator dependencies

Merge pull request dotnet#559 from sharwell/update-tools

Update compiler toolset to 3.7.0-4.20351.2

Merge pull request dotnet#559 from sharwell/update-tools

Update compiler toolset to 3.7.0-4.20351.2

Merge pull request dotnet#559 from sharwell/update-tools

Update compiler toolset to 3.7.0-4.20351.2

Merge pull request dotnet#559 from sharwell/update-tools

Update compiler toolset to 3.7.0-4.20351.2

Merge pull request dotnet#532 from sharwell/integration-tests

Add integration tests for successful project creation from templates

Merge pull request dotnet#510 from jpshrader/roslyn-sdk-112

roslyn-sdk-112: Change wording from 'Stand-Alone' to 'Standalone'

Merge pull request dotnet#510 from jpshrader/roslyn-sdk-112

roslyn-sdk-112: Change wording from 'Stand-Alone' to 'Standalone'

Merge pull request dotnet#502 from sharwell/cdata-markup

Fix support for markup around CDATA elements