Update version to 0.8.2

Update to latest Substrate master (paritytech#1074)

Bump version (paritytech#1071)

Update to latest Substrate master (paritytech#1058)

* Update to latest Substrate master

* again

Patch 0.7.31 (paritytech#1042)

* patch release

* update toml files

* update package versions

Release 0.7.30 (paritytech#1006)

* Release 0.7.30

* Update Substrate & libp2p

Release 0.7.29 (paritytech#998)

* Release 0.7.29

* Update `Cargo.lock`

Bump runtime version