1.3.0

Adds support for maximum decimal precision on Tarantool 3.5+ and drops
Python 3.6. Also fixes ConnectionPool idle CPU usage and recovery after
a cluster restart.

Changed

• Drop Python 3.6 support (PR #327).
• Support the maximum decimal precision for tarantool 3.5 and above (PR #342).

Fixed

• Set upper bound for version of setuptools (PR #342).
• Reduce idle CPU usage in ConnectionPool while waiting for
  queued requests (PR #336).
• Recover ConnectionPool instances after a cluster restart
  (PR #343).
• Fix typo in the name: PoolTolopogy -> PoolTopology. Ensured
  backward compatibility using aliases (PR #345).