Update .travis.yml

[eurisko-info-lab]

[graalvmbot]

Hello eurisko-info-lab, thanks for contributing a PR to our project!

We use the Oracle Contributor Agreement to make the copyright of contributions clear. We don't have a record of you having signed this yet, based on your email address 57254971+eurisko-info-lab -(at)- users -(dot)- noreply -(dot)- github -(dot)- com. You can sign it at that link.

If you think you've already signed it, please comment below and we'll check.

[graalvmbot]

Hello eurisko-info-lab, thanks for contributing a PR to our project!

We use the Oracle Contributor Agreement to make the copyright of contributions clear. We don't have a record of you having signed this yet, based on your email address 57254971+eurisko-info-lab -(at)- users -(dot)- noreply -(dot)- github -(dot)- com. You can sign it at that link.

If you think you've already signed it, please comment below and we'll check.

[oracle-contributor-agreement[bot]]

Thank you for your pull request and welcome to our community! To contribute, please sign the Oracle Contributor Agreement (OCA). The following contributors of this PR have not signed the OCA:

• PR author: @eurisko-info-lab
• [email protected] (@eurisko-info-lab)

To sign the OCA, please create an Oracle account and sign the OCA in Oracle's Contributor Agreement Application.

When signing the OCA, please provide your GitHub username. After signing the OCA and getting an OCA approval from Oracle, this PR will be automatically updated.

If you are an Oracle employee, please make sure that you are a member of the main Oracle GitHub organization, and your membership in this organization is public.