Moonbase Alphanet v0.5.0

Native runtimes:

• Moonbase Alphanet: 5

WASM runtimes built using 1.47.0-nightly and toolchain nightly-2020-10-03-x86_64-unknown-linux-gnu

Changes

• Removes MultiSignature (#127)
• Adds moonbeam types as npm module (#150, #190)
• Adds better code check/formatting (#143, #182)
• Adds support for GasWeightMapping (#174, #185)
• Enforces compiled wasm execution (#160, #172, #178)
• Implement the stake pallet and author pallet (#159, #173, #188, #192)
• Updates substrate from 54bde60c to f977fb8a (#176)
• Adds support for --chain alphanet with embedded parachain and relaychain specs (#169)
• Adds support for Ethereum RPC module txpool (#171)