Latest nuget package [1.1.15] is missing the runtimes

[bj-rn]

Describe the bug

Version 1.1.15 of the nuget package is missing the runtimes, same goes for 1.1.14.

• https://nuget.info/packages/libsurvive.net/1.1.15
• https://nuget.info/packages/libsurvive.net/1.1.14

They are available with 1.1.13