Dragonfly 0.7.0

Prominent features:
@iko1 , @dranikpg and @braydnm are without a doubt the stars of this release.

Periodic snapshotting support - by @braydn
Check out save_schedule flag for that.
Preliminary json support - by @iko1
Try running set foo '{"pi": 3.14 }' and then JSON.GET foo $.pi
Implementing STICK command by @dranikpg
You can now reliably keep items inside dragonfly with --cache_mode enabled.
Lua now supports cjson, struct, bits, msgpack modules (@dranikpg ).
Improved memory capping when using --maxmemory flag.
We patched several holes that allowed dragonfly to grow past the specified limit.

In addition, I added a grafana/prometheus docker-compose file under tools/local/monitoring/. It monitors a local dragonfly instance.

Huge thanks to all the contributors! ❤️

fix: RENAMENX according to spec #229 by @odedponcz in #230
docs: Improve wording in issue reporting by @odedponcz in #232
feat(test): Add integration test for the node-redis client by @odedponcz in #233
docs: Update README.md twitter handle by @odedponcz in #242
fix:change static assets url for http monitoring page by @odedponcz in #243
Move assets to static by @odedponcz in #247
feat(monitoring): Add docker-compose for local monitoring dashboard. by @romange in #246
feat(server): Implement STICK command #219 by @dranikpg in #245
feat(server): Implemented periodic snapshotting (#161) by @braydnm in #250
feat(server): tighten memory checks when inserting a new object. by @romange in #258
Integrate experimental Json functionality by @romange in #259
feat(core): Add lua modules by @dranikpg in #273

Full Changelog: v0.6.0...v0.7.0