v0.8.2

Features:

• An optimization has been (re)added which improves efficiency of the LWT queries. It causes the driver to always choose replicas in the ring order which improves performance when there is a lot of per-partition key contention. (#717)
• The driver now closes connections if there is no response to CQL keepalives. (#731)
• TCP-level keepalives have been added. (#735)
• There is an option now to switch off write coalescing optimization in the driver. This "optimization" is technically a tradeoff - it improves efficiency when the throughput is high, but may cause worse latency in a busy application which does not send so many queries. (#725)

Security fixes:

• The chrono dependency no longer requires the oldtime feature. That feature implies a transitive dependency on time crate in version 0.1, which has a vulnerability. More details here: https://rustsec.org/advisories/RUSTSEC-2020-0071 (#723)

Bugfixes:

• After execution profile support merge, the serial consistency was no longer set by default. It was an unintended and undocumented change; it is now fixed and the driver properly sets it to LocalSerial by default. (#729)

Enhancements:

• The SessionConfig::add_known_nodes{_addr} and SessionBuilder::known_nodes{_addr} functions were made more generic and now they accept a wider range of argument types. (#705)
• Clarified wording in the doc page about batches. (#712)
• An outdated driver version was specified in an example on the "Create project" page, now it points to a much newer one. (#715)
• An obsolete comment was removed from examples. (#716)
• A latency aware policy test with a very long name has been refactored so that it does not rely on timing, no longer causing flakiness of the CI. (#714)
• The CI now sets the RUST_BACKTRACE=full environment variable which causes full backtraces to be printed when panic occurs in tests. This should help in debugging issues, especially those that only occur in CI. (#719)
• Integration tests have been refactored into a single binary. This should reduce the time needed to build the tests and improve test parallelism. (#730)