* enable minimal logging

* Get referendum duration directly form governance

* ∆ describe to better reflect actual function
Impersonate manager to submit updateHistoryAndReturnLockedStCeloInVoting

* suppressed more logging by default

* removed onlymanager modifier

* * Changed named return variable in favor of
unnamed return variable. This improves readability.

* Updated natspec.

* updated yarn lock

* added vote contract version tracking

* WIP

* compatibility WIP

* groupped state vars && BUMP storage version

* reverted vote contract version

* formatting

* Review contributions. (#104)

Co-authored-by: Edwin <enginebox2012@gmail.com>