Driver::connect() should throw only driver-level exceptions

Deprecate Driver::getDatabase()

Fix DSN detection in the IBM DB2 driver

Simplify test suite configuration

Remove platform-specific portability mode constants

remove deprecations for ConnectionHelper

Deprecated platform-specific portability mode constants

Add tests for fetch*() methods of Portability\Result

[GH-4052] Deprecate MasterSlaveConnection and rename to PrimaryReplicaConnection

Extract Result from the Statement interface

Replace forward-compatible ResultStatement interfaces with Result

Report coverage unconditionally on Travis

pcov is fast enough for this to be acceptable.

Make caching layer not rely on closeCursor()

Integrate with Codecov

Update doctrine/coding-standard to 8.0