brevis-sql v0.8.0

Added: max_in_flight_per_tenant

• How many requests one tenant may have waiting on the warehouse, set in
  the file's limits. It was fixed at 4 in code. Four is right for one
  customer per key, and wrong for a key that serves many people, such as
  a gateway in front of a whole product: there a dashboard that fires its
  charts at once gets a 429 for every chart past the fourth.
• Default 4, so a file that does not set it behaves as before. File-wide
  only, like max_in_flight, and refused over it.