Deprecated [attr runs callback] in favourt of [attr --> callback]

Author: japgolly

core/src/main/scala/japgolly/scalajs/react/vdom/Extra.scala

@@ -17,8 +17,9 @@ object Extra {
   }
 
   final class AttrExt(val _a: Attr) extends AnyVal {
-    @inline def runs(thunk: => Unit) = _a := ((() => thunk): js.Function)
-    @inline def -->(thunk: => Unit) = runs(thunk)
+    @deprecated("[attr runs callback] will be removed in 0.8.0. Use [attr --> callback].", "v0.7.0")
+    @inline def runs(callback: => Unit) = -->(callback)
+    @inline def -->(callback: => Unit) = _a := ((() => callback): js.Function)
     @inline def ==>[N <: dom.Node, E <: SyntheticEvent[N]](eventHandler: E => Unit) = _a := (eventHandler: js.Function)
   }