skywalking_agent 0.6.0

Apache SkyWalking PHP Agent.

The PHP Agent for Apache SkyWalking, which provides the native tracing abilities for PHP project.

License: Apache-2.0


## What's Changed
* Polish doc about Swoole by @wu-sheng in
* Start 0.6.0 development. by @jmjoy in
* Fix hook for Doctrine PDO class by @matikij in
* Log Exception in tracing span when throw. by @jmjoy in
* Upgrade dependencies and adapt. by @jmjoy in
* Fix required rust version and add runing php-fpm notice in docs. by @jmjoy in
* Bump openssl from 0.10.48 to 0.10.55 by @dependabot in
* Fix the situation where the redis port is string. by @jmjoy in
* Optionally enable zend observer api for auto instrumentation. by @jmjoy in
* Fix the empty span situation in redis after hook. by @jmjoy in
* Add mongodb pluhgin. by @jmjoy in
* Update rust nightly toolchain in CI and format. by @jmjoy in
* Add notice document for `skywalking_agent.enable`. by @jmjoy in
* Upgrade dependencies. by @jmjoy in
* Fix docs by @heyanlong in
* Add kafka reporter. by @jmjoy in
* Release SkyWalking PHP Agent 0.6.0 by @jmjoy in

## New Contributors
* @matikij made their first contribution in

**Full Changelog**: