fix: default --open to !process.env.CI

[collinstevens]

Description

When running in CI, vitest will try to open the UI if you pass -ui because --open is defaulting to true even though it says it should default to !process.env.CI.

vitest/packages/vitest/src/node/cli.ts

Line 22 in cc19117

.option('--open', 'Open UI automatically (default: !process.env.CI))')

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