fix #37 to respect --skip-duplicates flag

fix #37 to respect --skip-duplicates flag

fix #38 by respecting spaces around version tag

fix #36 update to stricter version regexp to ignore comments

fix a possible issue for multiple projects

fix #31 remove nupkg deletion before dotnet pack

fix #30 & partially removed 2.4.0 changes due to bugs with nuget

add custom nuget feed support & set outputs

publish symbols & fail on any nuget push errors

fixes #26
fixes #27

log info to help understand the mis-configurations & stages of action