Release v0.7.0 (skytable#210)

* Simplify query gen in sky-bench and bump versions

* Upgrade to the latest driver version

Upgrade deps

Fix `HEYA` impl and add `HEYA` actiondoc

Also added heya echo test

Ignore errors in run loop

This fixes CVE-2021-37625

Reduce disk accesses with a trip switch

Fix bundling for `CARGO_TARGET_DIR` setups

Release v0.6.3 (skytable#184)

* Bump up version to 0.6.3

* Update changelog entry

Enable maximum connections to be configured manually (skytable#182)

* Enable maximum connections to be configured

* Add arbiter for handling server startup

* Add handling of maxcon for command-line args

* Add changelog entry

Release v0.6.2 (skytable#180)

* Bump up version and add changelog entry

* Use separate cache object for release workflows