v0.8.8

Changelog

2a4be2a [analytics] close loop on transporting analytics around on the context by removing global (#1679)
ff00d35 analytics: IncrIfUnopted sends tilt version (#1685)
76f7d67 cli: add 'tilt docker' and let the user manually enable/disable buildkit (#1683)
59cc5ce docker: disable buildkit on minikube. Fixes #1681 (#1684)
1163395 engine: fix flaky analytics test (#1686)
e22c7f6 integration: add analytics integration tests (#1675)
344dc1d k8s: clean up serializers so that they never print status objects (#1690)
6bf7355 upper: log 'detected a container change' message to ms.CombinedLog (#1687)