Added missing 'source' getter on Spec02#8

Merged

fabiojose merged 3 commits intocloudevents:masterfrom

micheleangioni:source-getter

Apr 18, 2019

Commits on Mar 6, 2019

Added missing 'source' getter on Spec02
micheleangioni
committed

Commits on Apr 7, 2019

Updated `secure` key of env.global in .travis.yml file
micheleangioni
committed

Commits on Apr 11, 2019

Removed coverage from .travis.yml
micheleangioni
committed