REPL: Make sure to call printSummary

For example:

    scala> @deprecated("no", "nah") class C; new C
    there were 1 deprecation warning(s); re-run with -deprecation for details
    // defined class C
    val res0: C = C@4273cda6

Author: dwijnand

compiler/src/dotty/tools/repl/ReplCompiler.scala

@@ -150,6 +150,7 @@ class ReplCompiler extends Compiler {
   private def runCompilationUnit(unit: CompilationUnit, state: State): Result[(CompilationUnit, State)] = {
     val ctx = state.context
     ctx.run.compileUnits(unit :: Nil)
+    ctx.run.printSummary()
 
     if (!ctx.reporter.hasErrors) (unit, state).result
     else ctx.reporter.removeBufferedMessages(using ctx).errors