chore(deps) bump Zipkin plugin to 0.0.2
chore(deps) bump Zipkin plugin to 0.0.2

This release fixes an issue with how timestamps can sometimes be encoded
with scientific notation, causin the Zipkin collector to refuse some
traces.

https://github.com/Kong/kong-plugin-zipkin/blob/master/NEWS

From #3578
Kong/kong,Mashape/kong,Kong/kong,Kong/kong