v0.6.0

Changelog

• 3e6fc06 test: name the stand-in cloudflared with .exe on Windows
• 41da55a docs: changelog for 0.6.0
• 9a53d4f docs: document the tunnel limits found in review
• 3e6d839 fix: wait for cloudflared to exit, keep https over the tunnel, block refused visitors, harden tunnel output reading
• a860730 docs: describe --public, its limits and the tunnel design
• 5aac336 test: cover --public with a stand-in cloudflared
• 8dd1dfc feat: --public shares over the internet through a Cloudflare quick tunnel
• 9d94920 docs: add the full set of README badges
• ca2d8be docs: add CI, release, npm, PyPI, Go version and license badges