Moonbase Alphanet v0.4.0

Native runtimes:

• Moonbase Alphanet: 4

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

Changes

• Updates to Parachain v1 with support for multi collators. (#102)
• Fixes estimateGas support for refunds (#136, polkadot-evm/frontier#230, polkadot-evm/frontier#227)
• Adds support for revert reason message (polkadot-evm/frontier#224)
• Supports for Eth transaction without ChainId (polkadot-evm/frontier@2ca1d1b)
• Updates genesis for the Alphanet to include test account and new balance values (#116, #121)
• Updates PolkadotJs types to match parachain v1 (#104)
• Sets ExistentialDeposit to 0 to avoid account nonce to be reset (not compatible with Eth) (#119)
• Automate tests specs, now generated when running the test (#113)
• Adds support for the status field in Eth transaction receipt (polkadot-evm/frontier#221)
• Changes receipt encoding to hexadecimal (polkadot-evm/frontier#203)