1.2.27

A hot-fix release

This is a hot-fix for changes in chrome debugger protocol.

Rolling DevTools

Merged commits bcef523...286339f from official DevTools.
Should work best with Chrome ~66.0.3335.2.
Links to matching Chromium snapshots: Mac | Linux_x64 | Win | Win_x64.

Notable commits

9cda826 lib: fix race when waiting for client-ready signal in weasel (fixes #69)

All new work: v1.2.26...v1.2.27