Unit tests not compatible with Windows

[SimonMarquis]

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🐛 Describe the bug

Unit test of project plugins are not compatible with Windows.
Execution failed for task ':refreshVersions:test'.

💣 Steps to reproduce

Execute this command on Windows machine from the plugins project:
.\gradlew clean check

📱 Tech info

This unit test fails:
de.fayard.refreshVersions.MigrationTest: Search for files that may contain dependency notations
With the following stacktrace:

org.opentest4j.AssertionFailedError: Element differ at index: [0, 2, 3, 4, 5, 6, 8, 9]
expected:<["app/feature/build.gradle.kts", "build.gradle", "buildSrc/src/main/kotlin/Dependencies.kt", "buildSrc/src/main/kotlin/Deps.kt", "buildSrc/src/main/kotlin/Libs.kt", "buildSrc/src/main/kotlin/Versions.kt", "buildSrc/src/main/kotlin/my/package/Deps.kt", "deps.gradle", "gradle/dependencies.gradle", "gradle/libraries.gradle", "libraries.groovy", "libs.gradle"]> but was:<["app\feature\build.gradle.kts", "build.gradle", "buildSrc\src\main\kotlin\Dependencies.kt", "buildSrc\src\main\kotlin\Deps.kt", "buildSrc\src\main\kotlin\Libs.kt", "buildSrc\src\main\kotlin\Versions.kt", "buildSrc\src\main\kotlin\my\package\Deps.kt", "deps.gradle", "gradle\dependencies.gradle", "gradle\libraries.gradle", "libraries.groovy", "libs.gradle"]>

The test compares file paths that are not platform independent:
https://github.com/jmfayard/refreshVersions/blob/873210a27849ad252af8d561d042d8730d23190e/plugins/dependencies/src/test/kotlin/de/fayard/refreshVersions/MigrationTest.kt#L211-L228