* CI: Fix cargo cache (#7968)
* Fix cache
Blocking waiting for file lock on the registry index
* Only clean locked cargo cache on windows
* fixed ethstore sign (#8026)
* fix cache & snapcraft CI build (#8052)
after successful testing it is necessary to port in a ```beta``` and ```stable```
* Add MCIP-6 Byzyantium transition to Musicoin spec (#7841)
* Add test chain spec for musicoin byzantium testnet
* Add MCIP-6 Byzyantium transition to Musicoin spec
* Update mcip6_byz.json
* ethcore: update musicoin byzantium block number
* ethcore: update musicoin byzantium block number
* ethcore: update musicoin bootnodes
* Update musicoin.json
* Update musicoin.json
* More bootnodes.
