Control event value in simulator (#343)

* implement pxsim.control.eventValue and pxsim.control.eventTimestamp in the simulator

package.json

@@ -36,6 +36,6 @@
     "semantic-ui-less": "^2.2.4"
   },
   "dependencies": {
-    "pxt-core": "0.10.4"
+    "pxt-core": "0.10.5"
   }
 }

sim/state/misc.ts

@@ -65,6 +65,14 @@ namespace pxsim.control {
         // TODO mode?
         board().bus.queue(id, evid)
     }
+
+    export function eventValue(): number | string {
+        return board().bus.getLastEvent();
+    }
+
+    export function eventTimestamp(): number {
+        return board().bus.getLastEventTime();
+    }
 }
 
 namespace pxsim.pxtcore {