Adding recipe to return minimum JUnit version

[lkerford]

What's changed?

Adding a new recipe which returns the minimum JUnit version

What's your motivation?

We need a recipe to return the minimum JUnit version for the DevCenter. Currently, we are finding annotations but this finds all JUnits versions which are used not the minimum version which is used

• https://github.com/moderneinc/moderne-devcenter/issues/602

[github-actions]

Some suggestions could not be made:

• build.gradle.kts
  • lines 21-20
• src/main/java/org/openrewrite/java/dependencies/search/FindMinimumDependencyVersion.java
  • lines 20-20

[timtebeek]

We're 3 months away from 6.0.0-M1: https://github.com/junit-team/junit5/milestone/87

• Change Java baseline to 17 for 6.0 junit-team/junit5#4246

Suggested change

	valid = {"4", "5"},
	valid = {"4", "5", "6"},

[lkerford]

As JUnit 6 is not released at this time, we won't know how to determine if they are using JUnit 6. We might want to add this after we know how to determine if JUnit 6 is being used

[timtebeek]

I wonder if we should call out here that this recipe is intended as a measure to tell projects that have (some) JUnit 4 apart from projects that have no JUnit 4 (but some JUnit 5). No that's a bit implied in the logic below, but making it explicit might prevent confusion for users, as well as devs that change this in months to come.

[lkerford]

I agree, I'm going to update the description to include more details

[timtebeek]

Looks good already, I've pushed some very light polish, but otherwise good to merge if you ask me. I did ask whether we should update the description, but also fine to keep that as is.