Update IDBDatabase interface

http://www.w3.org/TR/IndexedDB/#database-interface

Author: falsandtru

baselines/dom.generated.d.ts

@@ -6924,7 +6924,7 @@ interface IDBDatabase extends EventTarget {
     objectStoreNames: DOMStringList;
     onabort: (ev: Event) => any;
     onerror: (ev: Event) => any;
-    version: string;
+    version: number;
     close(): void;
     createObjectStore(name: string, optionalParameters?: IDBObjectStoreParameters): IDBObjectStore;
     deleteObjectStore(name: string): void;

baselines/webworker.generated.d.ts

@@ -309,7 +309,7 @@ interface IDBDatabase extends EventTarget {
     objectStoreNames: DOMStringList;
     onabort: (ev: Event) => any;
     onerror: (ev: Event) => any;
-    version: string;
+    version: number;
     close(): void;
     createObjectStore(name: string, optionalParameters?: IDBObjectStoreParameters): IDBObjectStore;
     deleteObjectStore(name: string): void;

inputfiles/overridingTypes.json

@@ -289,5 +289,11 @@
         "interface": "HTMLMediaElement",
         "name": "readyState",
         "type": "number"
+    },
+    {
+        "kind": "property",
+        "interface": "IDBDatabase",
+        "name": "version",
+        "type": "number"
     }
 ]