v0.8.7

Changelog

7dffcdf engine: fix service watching (#1647)
d8413d2 k8s: log kubectl commands on --klog > 0 (#1674)
6370bae readme: update video link/thumbnail (#1671)
e6565e5 tiltfile: deprecation warning for FastBuild (#1677)
62f5b1c ui: use crashlog for crashes (#1672)
45efcb3 update dev version to 0.8.6 (#1666)
7777e4d upper test: don't use assert.FailNow b/c its type signature doesn't make sense (#1665)
cc79343 web: analytics nudge confirmation disappears after 15s (up from 4s) (#1678)
d8c0045 web: finish rename of ErrorPane to AlertPane (#1673)
10d4798 web: use build error formatting for other errors too (#1670)
4cc4b4f webview/engine: send stat when we surface nudge || ctx: analytics stored on context like logger is [ch2618] (#1676)