Update .travis.yml
Update .travis.yml

💚 update to specific skasip package revisions.

This is to resolved backwards incompatibility of the new skasip-config-db library (version 1.2.0)
SKA-ScienceDataProcessor/integration-prototype,SKA-ScienceDataProcessor/integration-prototype,SKA-ScienceDataProcessor/integration-prototype,SKA-ScienceDataProcessor/integration-prototype