Updates for internal dependencies for networking and system packages

Changelog for 0.16.6:

• PR #298 Fix install script: remove v prefix from containerd version value by @welteki

Commits
7c11822 Update apimachinery by @alexellis
95792f8 Update dependencies by @alexellis
60b724f Update gateway version by @alexellis
e0db59d Update README.md by @alexellis
13304fa Fix for user issue with Caddy by @alexellis
a65b989 Fix install script by @welteki

Changes: 0.16.5...0.16.6

Generated by Derek