Enable heartbeat by default
Enable heartbeat by default

bridgewell/csharp-driver,kishkaru/csharp-driver,maxwellb/csharp-driver,alprema/csharp-driver,datastax/csharp-driver,maxwellb/csharp-driver,jorgebay/csharp-driver,mintsoft/csharp-driver,trurl123/csharp-driver,datastax/csharp-driver