Make dom.crypto.crypto a native JS val.

Instead of a Scala val delegating to a val in a JS global scope
object.

Author: sjrd

src/main/scala/org/scalajs/dom/crypto/Crypto.scala

@@ -4,6 +4,7 @@ import scala.scalajs.js
 import scala.scalajs.js.annotation._
 import scala.scalajs.js.typedarray.ArrayBufferView
 
+@deprecated("use dom.crypto.crypto instead", "2.0.0")
 @js.native
 @JSGlobalScope
 object GlobalCrypto extends js.Object {

src/main/scala/org/scalajs/dom/crypto/package.scala

@@ -1,13 +1,16 @@
 package org.scalajs.dom
 
 import scala.scalajs.js
+import scala.scalajs.js.annotation._
 import scala.scalajs.js.typedarray.{ArrayBufferView, ArrayBuffer, Uint8Array}
 import scala.scalajs.js.|
 
 import scala.language.implicitConversions
 
 package object crypto {
-  val crypto = GlobalCrypto.crypto
+  @js.native
+  @JSGlobal("crypto")
+  val crypto: Crypto = js.native
 
   type BigInteger = Uint8Array