Target netcoreapp 3.1#7

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jozefchmelar wants to merge 3 commits intosourcechord:masterfrom

jozefchmelar:master

Commits on Aug 7, 2020

Converted old csproj to new version using dotnet migrate-2019 wizard
Jozef Chmelar ml
committed
Removed useless assemblies for .NET Core app
Jozef Chmelar ml
committed
Bumped minor version
Jozef Chmelar ml
committed