added sysex input event

Author: hrueger

index.d.ts

@@ -66,6 +66,7 @@ export declare class Input extends EventEmitter {
   on(evt: "stop", handler: () => void): this;
   on(evt: "activesense", handler: () => void): this;
   on(evt: "reset", handler: () => void): this;
+  on(evt: "sysex", handler: (param: Array<number>) => void): this;
   close();
 }