Updating project .gitignore rule

[thapabhesh]

We need to update the .gitignore file to track MSharp.DSL.runtimeconfig.json. The file is not being tracked on our local git.

M#/lib/netcoreapp2.1/*
!M#/lib/netcoreapp2.1/MSharp.DSL.runtimeconfig.json

The above rule should be updated to the following

M#/lib/*
!M#/lib/netcoreapp2.1/
M#/lib/netcoreapp2.1/*
!M#/lib/netcoreapp2.1/MSharp.DSL.runtimeconfig.json

[iPazooki]

I changed the file as you wished, although we had Template before each one. @thapabhesh