Cache dependencies on Travis CI (#62)
Cache dependencies on Travis CI (#62)

This change will cache Go mod dependencies on Travis CI and speed up
builds
open-telemetry/opentelemetry-collector-contrib,open-telemetry/opentelemetry-collector,open-telemetry/opentelemetry-collector,open-telemetry/opentelemetry-collector,open-telemetry/opentelemetry-collector-contrib