test(platform): Explicitly added a new line type to tests

[boenrobot]

This allows tests to run normally on Windows.

PR Checklist

Please check if your PR fulfills the following requirements:

• The commit message follows our guidelines: https://github.com/nestjs/nest/blob/master/CONTRIBUTING.md
• Tests for the changes have been added (for bug fixes / features)
• [N/A] Docs have been added / updated (for bug fixes / features)

PR Type

What kind of change does this PR introduce?

[ ] Bugfix
[ ] Feature
[ ] Code style update (formatting, local variables)
[x] Refactoring (no functional changes, no api changes)
[ ] Build related changes
[x] CI related changes
[ ] Other... Please describe:

What is the current behavior?

The new line of tests was left as the default. However, on Windows, TypeScript generates files with Windows line endings, making the test expectations not match.

Issue Number: N/A

What is the new behavior?

New line is explicitly set to linux line endings, so that regardless of what platform the tests are executed on, the tests will pass.

Does this PR introduce a breaking change?

[ ] Yes
[x] No

Other information

[kamilmysliwiec]

Thanks!

[lock]

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