tons of bugfixes and additional logging

dist/index.d.ts

@@ -1,6 +1,7 @@
 export declare class TetherClient {
     private websocketHandler;
     private subscribedQueries;
+    private pendingMutations;
     connect: (url: string) => void;
     disconnect: () => void;
     subscribe: (queryName: string, params: any, callback: (data: any) => void) => void;