refactor(blockapis): replace bluebird with native promises

Ticket: DX-1126

TICKET: DX-1126

Author: kev-daniell

Diff for: modules/blockapis/package.json

@@ -24,7 +24,6 @@
   "dependencies": {
     "@bitgo/utxo-lib": "^11.2.4",
     "@types/superagent": "4.1.16",
-    "bluebird": "^3.7.2",
     "superagent": "^9.0.1"
   },
   "lint-staged": {

Diff for: modules/blockapis/src/BaseHttpClient.ts

@@ -1,5 +1,4 @@
 import * as superagent from 'superagent';
-import * as Bluebird from 'bluebird';
 
 export class ApiRequestError extends Error {
   constructor(public url: string, public reason: Error | string) {
@@ -29,7 +28,13 @@ export interface HttpClient {
 }
 
 export function mapSeries<T, U>(arr: T[], f: (v: T, i: number) => Promise<U>): Promise<U[]> {
-  return Bluebird.mapSeries(arr, f);
+  const results: U[] = [];
+  return (async () => {
+    arr.map(async (v, i) => {
+      results.push(await f(v, i));
+    });
+    return results;
+  })();
 }
 
 export class BaseHttpClient implements HttpClient {