dba_exists

• Parameter type added for parameter #2 ($dba): Dba\Connection

- dba_exists(array|string $key, $dba): bool
+ dba_exists(array|string $key, Dba\Connection $dba): bool

• Parameter type added for parameter #1 ($key): array|string

- dba_exists($key, $dba): bool
+ dba_exists(array|string $key, $dba): bool

• Return type added: bool
• Parameter name of parameter #2 changed: $handle to $dba

- dba_exists($key, $handle)
+ dba_exists($key, $dba): bool