Implement minimial flow support (#71)

KevinGrandon · ganemone · commit 1eba82c186cb · 2018-02-12T12:11:59.000-08:00
#71
diff --git a/src/index.js b/src/index.js
@@ -3,6 +3,8 @@
  * This source code is licensed under the MIT license found in the
  * LICENSE file in the root directory of this source tree.
  */
+
+// @flow
 import {
   RPCToken,
   RPCHandlersToken,
