Bump to .NET 10 (#24)

Shorter method names in (I)EmailComposer (#19)

* Remove Set prefix from IEmailComposer methods
* Update readme
* Bump example packages

Simplify API (#18)

Support .NET 6/7/8 (#17)

* Use .NET 6.0, .NET 7.0, .NET 8.0
* Bump major versions of dependencies

CommonMark readme syntax #12

Bump and publish new version 1.1.1

Bump version to 1.1.0 #7

Bump packages and release prep

Publish packages to nuget.org

Bump and publish packages to internal feed