1.0.0-beta3

This PR fixes an error when using an array as carrier on injection.

1.0.0-beta2

• Added support for traceID128bits (https://github.com/jcchavezs/zipkin-php/issues/33) thanks to @cc5092
• Improved some variable naming

1.0.0-beta1

This release include all the functionalities and is stable enough to be used in production however there is an urgent need for the in process context propagation to be tackled in order to instrument common libraries and there is a PR for that: https://github.com/jcchavezs/zipkin-php/pull/30.