Replace process.browser with detect-node library

packages/utils/package.json

@@ -39,6 +39,7 @@
         "@0xproject/typescript-typings": "^0.4.2",
         "@types/node": "^8.0.53",
         "bignumber.js": "~4.1.0",
+        "detect-node": "2.0.3",
         "ethereum-types": "^0.0.2",
         "ethereumjs-util": "^5.1.1",
         "ethers": "3.0.22",

packages/utils/src/fetchAsync.ts

@@ -1,3 +1,4 @@
+import isNode = require('detect-node');
 import 'isomorphic-fetch';
 
 export const fetchAsync = async (
@@ -6,7 +7,7 @@ export const fetchAsync = async (
     timeoutMs: number = 20000,
 ): Promise<Response> => {
     let optionsWithAbortParam;
-    if ((process as any).browser === true) {
+    if (isNode) {
         const controller = new AbortController();
         const signal = controller.signal;
         setTimeout(() => {

packages/utils/src/globals.d.ts

@@ -4,3 +4,7 @@ declare module '*.json' {
     export default json;
     /* tslint:enable */
 }
+
+declare module 'detect-node' {
+    export const isNode: boolean;
+}