Update uber/jaeger-client-go and uber/jaeger-lib
- uber/jaeger-client-go from 2.15.0 to 2.16.0: https://github.com/jaegertracing/jaeger-client-go/releases/tag/v2.16.0
- uber/jaeger-lib from 1.5.0 to 2.0.0: https://github.com/jaegertracing/jaeger-lib/releases/tag/v2.0.0
Closes #7
Edited by Rémy Coutable