don't use. use 0.8.3 instead

mostly bugfixes + promql, auto kafka offset, ...

• fix tagdb routes #846
• move backend stores into their own package #851
• fix sortByName calls in dashboard 8ac5a28
• Initial tag query performance improvements #848
• offset 'auto' option to set kafka offset to retention - segmentSize in k8s, with fallback to oldest #850 , #861
• mt-update-ttl multithreaded (much faster) + more #843
• Added missing batch/agg functions #847
• experimental promql support #858
• Make sure rollup data is persisted before GC #840
• Add support for graphite's summarize #837
• fix: GC task too eagerly closes chunks. #844