Merge pull request #518 from ndrake/fix-type-typo

Fix mispelling of characteristic in index.d.ts

types/index.d.ts

@@ -871,7 +871,7 @@ declare namespace BluetoothlePlugin {
         /** Service's UUID */
         service: string,
         /** Characteristic UUID */
-        characterisitc: string,
+        characteristic: string,
         /** This integer value will be incremented every read/writeRequested */
         requestId: number,
         /** Offset value */