* feat: add validator pop reward as chain param
* feat: add store for challenge initiator reward amount indexed by height
* feat: add validator PoP reward calculation between distributions
* fix: remove paralleltest lint rule due to data race
---------
Signed-off-by: Lorenz Herzberger <lorenzherzberger@gmail.com>
This is the quasi-standard and fixes the error below:
```
$ go get -u github.com/planetmint/planetmint-go@v0.1.0
go: github.com/planetmint/planetmint-go@v0.1.0: parsing go.mod:
module declares its path as: planetmint-go
but was required as: github.com/planetmint/planetmint-go
```
Signed-off-by: Julian Strobl <jmastr@mailbox.org>
