cross-ci@0.3.1 vulnerabilities

`cross-ci` standardizes environment variables for CI. For example, your can simply use `BUILD_BRANCH` variable in all CI runners instead of `CIRCLE_BRANCH` in CircleCI or `TRAVIS_PULL_REQUEST_BRANCH` in Travis.

Direct Vulnerabilities

No direct vulnerabilities have been found for this package in Snyk’s vulnerability database. This does not include vulnerabilities belonging to this package’s dependencies.

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