2.5.1

• RUBY-1243 Test wire version overlap logic
• RUBY-1283 Enable and configure TCP keepalive by default.
• RUBY-1300 Decrease likelihood of implicit session leaks.
• RUBY-1278 Verify that percents are encoded in connection string creds and rsync connection string common driver tests
• RUBY-1294 Associate a session pool with a cluster instead of a client.
• RUBY-1291 Use an ENV variable to skip tests relying on external connection.
• RUBY-1284 Require Forwardable module explicitly in Error::Operation.
• RUBY-1285 Use socket address to initialize ipv4 resolver when host is localhost.
• RUBY-1275 Add pipeline example to ChangeStream spec (for docs)
• Use EventSubscriber singleton and common subscribed client in tests