Bump travis-ci from 2.1.1 to 2.2.0 in /modules/travis-ci

[dependabot-preview]

Bumps travis-ci from 2.1.1 to 2.2.0.

Commits

• 7520463 v2.2.0
• 4fcaea1 Merge pull request #28 from basti1302/master
• be16467 chore: update request to remove vulnerabilities
• 39ad0c3 Only apps should have lockfiles
• 1edf157 [Refactor] always use String(x) over x.toString()
• 9cef007 Merge pull request #22 from SimenB/enterprise
• 4a5c50a refactor: remove unused variable
• 4fad897 tests: add some tests for url validation
• cf55203 feat: support Travis Enterprise
• 5553d98 Merge pull request #19 from lyalamanchili/support_envvars
• Additional commits viewable in compare view

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