• Fix the credentials type definition (#1459 contributed by @greenboxal)
• Export the ClientOptions type (#1465 contributed by @SimenB)
• Don't use a global throaway timer for constructing server calls (#1463 contributed by @azban)
• Consistently set servername connection option to support SNI (#1466)
• Don't block in Server#tryShutdown waiting for already-closed sessions to close (#1467)
• Export propagate constants (#1468)
• Add port number to :authority header, but leave it out of service_url passed to metadata generator call credential callbacks (#1478)
• Ensure only one read is pending at a time when handling streams (#1479)
• Add priority and weighted_target load balancing policies internally for use in future features (#1433, #1449)