Release v0.6.4

Main Updates

This is a minor bug fix release.

• [Bug Fix] Fix 'ca certs not found' issue when TLS is not enabled
• [Example] New Nginx Zip example
• [Example] New PHP Zip example

What's Changed

• Update examples to v0.6.3 by @bnusunny in #191
• Improved Nginx Example by @elonniu in #192
• Added Nginx ZIP Example by @elonniu in #171
• Improved PHP example by @elonniu in #164
• Separate HTTPS and HTTP adapters by @bnusunny in #196
• Prepare to release v0.6.4 by @bnusunny in #197

Full Changelog: v0.6.3...v0.6.4