Bump dependencies (#788)

* Bump dependencies

* Remove signing length check

packages/api-derive/package.json

@@ -30,7 +30,7 @@
   },
   "homepage": "https://github.com/polkadot-js/api/tree/master/packages/api-derive#readme",
   "dependencies": {
-    "@babel/runtime": "^7.3.4",
+    "@babel/runtime": "^7.4.0",
     "@polkadot/api": "^0.48.1",
     "@polkadot/types": "^0.48.1",
     "@types/memoizee": "^0.4.2",

packages/api-derive/src/util/drr.spec.ts

@@ -18,13 +18,13 @@ describe('drr', () => {
   });
 
   it('should be a ReplaySubject(1)', (done) => {
-    const obs = timer(0, 200).pipe(drr()); // Starts at 0, increments every 200ms
+    const obs = timer(0, 100).pipe(drr()); // Starts at 0, increments every 100ms
     obs.subscribe(); // Fire the observable
 
     // Subscribe another time after some time, i.e. after the observable has fired
     setTimeout(() => {
       obs.subscribe((value) => {
-        expect(value).toBe(2);
+        expect(value > 1).toBe(true);
         done();
       });
     }, 500);