note on maintenance

Author: larsrh

README.md

@@ -3,6 +3,10 @@ simulacrum
 
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+**Note on maintenance** 
+
+This project is only maintained for Scala 2.x. No new features are developed, but bug fix releases will still be made available. For Dotty/Scala 3, please use [simulacrum-scalafix](https://github.com/typelevel/simulacrum-scalafix), which is a set of Scalafix rewrites that mirror simulacrum's features.
+
 Type classes rock. Alas, their encoding in Scala requires a lot of boilerplate, which doesn't rock. There is inconsistency between projects, where type classes are encoded differently. There is inconsistency within projects, where object-oriented forwarders (aka. ops, syntax) accidentally differ in exact parameter lists or forwarders are missing where they are expected to be. Even in disciplined teams, the bike-shedding opportunities alone are a source of lost productivity.
 
 This project addresses these concerns by introducing first class support for type classes in Scala 2.11. For example: