Release v0.12.3

New features

• Added the gpubsub_publisher connector
• Added the gpubsub_consumer connector
• Added new metadata options to elastic connector: version, version_type, retry_on_conflict, if_primary_term, if_seq_no

Fixes

• Don't fail unrecoverably when the connection to the server is lost in Google PubSub consumer.
• Update bert operators to work with tremor 0.12
• Fix race condition leading to quiescence timeout when shutting down Tremor
• Fix timeout config unit mismatch in qos::backpressure and qos::percentile operators. Changed to nanoseconds precision.
• Update WAL operator to fix issue with overwriting first entries.