fix typings

src/server.ts

@@ -104,11 +104,11 @@ export class SubscriptionServer {
   private closeHandler: () => void;
   private specifiedRules: Array<(context: ValidationContext) => any>;
 
-  public static create(options: ServerOptions, socketOptions: WebSocket.IServerOptions) {
+  public static create(options: ServerOptions, socketOptions: WebSocket.ServerOptions) {
     return new SubscriptionServer(options, socketOptions);
   }
 
-  constructor(options: ServerOptions, socketOptions: WebSocket.IServerOptions) {
+  constructor(options: ServerOptions, socketOptions: WebSocket.ServerOptions) {
     const {
       onOperation, onOperationComplete, onConnect, onDisconnect, keepAlive,
     } = options;

src/test/tests.ts

@@ -108,7 +108,7 @@ const schema = new GraphQLSchema({
         subscribe: withFilter(() => testPubsub.asyncIterator('userFiltered'),
           (user: any, args: { [key: string]: any }) => {
             return !args['id'] || user.id === parseInt(args['id'], 10);
-          }),
+          }) as any,
       },
       context: {
         type: GraphQLString,