Missing events on the library

[HolyOne]

OnPause, OnResume , OnInstall, OnUninstall events are needed for this project to be complete

[PeterKottas]

Sure that can be beneficial, I don't need these at the moment, however it would be great if you could add them. I am sure others would appreciate it as well!

[PeterKottas]

Implemented by https://github.com/PeterKottas/DotNetCore.WindowsService/releases/tag/v2.0.4