Update Ember to 3.1

app/components/add-proposal/component.js

@@ -1,7 +1,7 @@
-import Component from 'ember-component';
-import computed, { and } from 'ember-computed';
-import injectService from 'ember-service/inject';
-import isPresent from 'kredits-web/utils/cps/is-present';
+import Component from '@ember/component';
+import { computed } from '@ember/object';
+import { and, notEmpty } from '@ember/object/computed';
+import { inject as injectService } from '@ember/service';
 
 export default Component.extend({
   kredits: injectService(),
@@ -22,28 +22,28 @@ export default Component.extend({
 
   contributors: [],
 
-  isValidRecipient: isPresent('contributorId'),
+  isValidRecipient: notEmpty('contributorId'),
   isValidAmount: computed('amount', function() {
-    return parseInt(this.get('amount'), 10) > 0;
+    return parseInt(this.amount, 10) > 0;
   }),
-  isValidDescription: isPresent('description'),
-  isValidUrl: isPresent('url'),
+  isValidDescription: notEmpty('description'),
+  isValidUrl: notEmpty('url'),
   isValid: and('isValidRecipient',
                'isValidAmount',
                'isValidDescription'),
 
   reset: function() {
-    this.setProperties(this.get('attributes'));
+    this.setProperties(this.attributes);
   },
 
   actions: {
     submit() {
-      if (!this.get('isValid')) {
+      if (!this.isValid) {
         alert('Invalid data. Please review and try again.');
         return;
       }
 
-      let attributes = Object.keys(this.get('attributes'));
+      let attributes = Object.keys(this.attributes);
       let proposal = this.getProperties(attributes);
       let saved = this.save(proposal);