Bump version to 5.0.1

Merge pull request #35 from 0xced/net6.0

Modernize project

Add test results output to build script

Reduce number of build actions when packaging

Version bump to 3.2.0

Fix build script to output symbol package

Update build script for RTM dotnet CLI

Add exception when method does not exist on type

Fixes GH-5.

Simplify restore step in build script

On a clean / pristine checkout of the repository the build script will not
work properly because 'dotnet restore' is not run on test/LibraryWithPrivateMembers.

This commit fixes the issue by utilizing the 'dotnet restore' ability to
run on the solution file.