Merge pull request #737 from zetashift/fix/#729

Change `Storage#length` to a `def` instead of `var`

Author: armanbilge

api-reports/2_12.txt

@@ -25109,7 +25109,7 @@ StereoPannerNode[JT] def removeEventListener[T <: Event](`type`: String, listene
 Storage[JC] def clear(): Unit
 Storage[JC] def getItem(key: String): String
 Storage[JC] def key(index: Int): String
-Storage[JC] var length: Int
+Storage[JC] def length: Int
 Storage[JC] def removeItem(key: String): Unit
 Storage[JC] def setItem(key: String, data: String): Unit
 StorageEstimate[JT] val quota: Double

api-reports/2_13.txt

@@ -25109,7 +25109,7 @@ StereoPannerNode[JT] def removeEventListener[T <: Event](`type`: String, listene
 Storage[JC] def clear(): Unit
 Storage[JC] def getItem(key: String): String
 Storage[JC] def key(index: Int): String
-Storage[JC] var length: Int
+Storage[JC] def length: Int
 Storage[JC] def removeItem(key: String): Unit
 Storage[JC] def setItem(key: String, data: String): Unit
 StorageEstimate[JT] val quota: Double

dom/src/main/scala/org/scalajs/dom/Storage.scala

@@ -16,7 +16,7 @@ import scala.scalajs.js.annotation._
 @js.native
 @JSGlobal
 class Storage extends js.Object {
-  var length: Int = js.native
+  def length: Int = js.native
 
   def getItem(key: String): String = js.native