Merge pull request #38 from Philippus/patch-1

Add scala 2.12.12

Author: cb372

README.md

@@ -93,7 +93,7 @@ addCompilerPlugin("com.github.cb372" % "scala-typed-holes" % "0.1.4" cross Cross
 The plugin is published for the following Scala versions:
 
 * 2.11.12
-* 2.12.{8, 9, 10, 11}
+* 2.12.{8, 9, 10, 11, 12}
 * 2.13.{0, 1, 2, 3}
 
 ## Changing the log level