Release 2.0.0-beta7

Publish 2.0.0-beta6

Merge pull request toddams#329 from chancie86/issue287

Fixes toddams#287: Layout not rendered when using await IncludeAsync using .NET Core 3

.NET Core 3.1 support

snupkg, interface fixes

Approximate tag based on .NET Core 3.0 support.

Fixes toddams#284

Also cleaned up xmldoc

Bump version

Update README.md

Update README.md