Release 2.4.0

libnserial: Provide debian files for Ubuntu 21.10 (Impish Indri)

Issue: DOTNET-438

libnserial: Provide debian files for Ubuntu 21.04 (Hirsute Hippo)

Issue: DOTNET-440

Built using the commands:

> dotnet build -c Signed_Release .\code\SerialPortStream.csproj /p:PackageVersion=2.4.0-Preview.20211013
> dotnet pack -c Signed_Release --include-symbols --include-source .\code\SerialPortStream.csproj /p:PackageVersion=2.4.0-Preview.20211013

Release 2.3.1

Release 2.3.0.0

libnserial: Provide debian files for Ubuntu 20.10 (Groovy Gorilla)

Issue: DOTNET-317

libnserial: Provide debian build files for Focal Fossa

Issue: DOTNET-317

libnserial: Provide debian packages for Eoan

Issue: DOTNET-317

libnserial: Provide packages for Disco Dingo Ubuntu 19.04

Issue: DOTNET-317