Use ember-auto-import instead of ember-browserify

app/services/kredits.js

@@ -1,5 +1,5 @@
-import ethers from 'npm:ethers';
-import Kredits from 'npm:kredits-contracts';
+import ethers from 'ethers';
+import Kredits from 'kredits-contracts';
 import RSVP from 'rsvp';
 
 import Service from '@ember/service';

app/utils/cps/bignumber.js

@@ -1,5 +1,5 @@
 import { computed } from '@ember/object';
-import ethers from 'npm:ethers';
+import ethers from 'ethers';
 
 export default function(dependentKey, converterMethod) {
   return computed(dependentKey, {

app/utils/cps/kredits.js

@@ -1,5 +1,5 @@
 import { computed } from '@ember/object';
-import ethers from 'npm:ethers';
+import ethers from 'ethers';
 import formatKredits from 'kredits-web/utils/format-kredits';
 
 export default function(dependentKey, options = {}) {

app/utils/format-kredits.js

@@ -1,4 +1,4 @@
-import ethers from 'npm:ethers';
+import ethers from 'ethers';
 
 export default function(value, options = {}) {
   let etherValue = ethers.utils.formatEther(value);