Define all groups in paket.dependencies to fix build

[tmoers]

This should fix the build so that a new version for System.Reactive >= 6.0 can be released

Note that I am not familiar with paket, so the approach here might very well be incorrect.
Some more context can be found in #175

[tmoers]

Could anyone have a look at this? It would be nice to finally have a version that can be used without build warnings

[tmoers]

@deviousasti You unfroze the pipelines last time, maybe you can do it again this time?

[tmoers]

I'm tagging everyone who did something during the last few years. Could anyone please have a look at this one?

@deviousasti @panesofglass @cartermp @lowleveldesign @Micha-kun @stijnmoreels @forki @cloudRoutine

[bentayloruk]

Hi All, does anyone happen to be having a look at this? Thought I would ask before I make my own build, as I'm running into the same issue that others have documented in #175.

[tmoers]

I haven't received any feedback.. It feels like this project is dead tbh

[bentayloruk]

@tmoers it does seem a bit odd. I would have assumed it is quite widely used and this would be a common issue. Perhaps it needs a call for new maintainers or maybe everyone has moved to something else? I'm a bit behind the curve having been out of programming for a couple of years.

[deviousasti]

@tmoers Sorry, I was kinda sick and overworked for a few months.
Trying to fix the build pipelines first. This was cleaned up in #177.

[tmoers]

@deviousasti No problem, you do this in your spare time so no need to apologize