Support multiple annotations used on the same class or field in a native way instead of string concatenation

[jxnu-liguobin]

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Describe the solution you'd like
customAnnotationsMapping

  val mapping = new util.HashMap[String, Set[String]]

  val annotationsA = new util.HashSet[String]
  val annotationsB = new util.HashSet[String]

  annotationsA.add(annotionA)
  annotationsA.add(annotionB)

  annotationsB.add(annotionC)
  annotationsB.add(annotionD)

  mapping.put(fieldA,  annotationsA)
  mapping.put(fieldB,  annotationsB)

Describe alternatives you've considered
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[kobylynskyi]

@jxnu-liguobin Thanks for this feature request.
I've implemented it in develop branch (version 3.0.0). So feel free to update sbt-plugin implementation. Thanks!

[jxnu-liguobin]

So feel free to update sbt-plugin implementation.

ok

[kobylynskyi]

@jxnu-liguobin I've created a separate issue to track sbt-plugin changes: #276

[kobylynskyi]

Version 3.0.0 was released today.