v1.2.0

Client

• Fixed bug in substreams init with numbers in ABI types

Backend

• Return the correct GRPC code instead of wrapping it under an "Unknown" error. "Clean shutdown" now returns CodeUnavailable. This is compatible with previous substreams clients like substreams-sql which should retry automatically.
• Upgraded components to manage the new block encapsulation format in merged-blocks and on the wire required for firehose-core v1.0.0