JUnit 5 Migration

[syoon2]

The current impl is using Junit 4 and is WAI. Please send a PR if you want to upgrade to Junit 5, altough that might breaks other tests along the way

https://github.com/williamfiset/Algorithms/blob/master/build.gradle#L35

Originally posted by @williamfiset in https://github.com/williamfiset/Algorithms/issues/294#issuecomment-985931731

This PR migrates all JUnit 4-based test suites to JUnit 5. This includes:

• Replacing JUnit 4 API uses with JUnit 5 (Switching to the latest and the greatest 😄)
• Bumping up test dependencies to latest versions (d21b550)

This does not include:

• Tests originally written with google/truth being rewritten with JUnit 5 (yes, I saw #195)
  • Only exception: SkipListTest.java (which was written only using JUnit 4 in the first place)

Side note: Due to an upstream "issue" with google/truth, JUnit 4 is indirectly included as a test dependency regardless of this PR 😢 - see https://github.com/google/truth/issues/333 for context.

[syoon2]

@williamfiset Just a kind ping :)

[ptahchiev]

Any chance to get this merged?