build: updates import paths for addon compatibility. (#47)

* feat(deps): migrates to sheetjs cdn.

* chore: removes relative imports.

addon/services/csv.js

@@ -1,6 +1,6 @@
 import Service from '@ember/service';
+import optionize from '@linc-technologies/ember-spreadsheet-export/utils/utils';
 import { saveAs } from 'file-saver';
-import optionize from '../utils/utils';
 
 const defaultConfig = {
   download: true,

addon/services/excel.js

@@ -1,7 +1,7 @@
 import Service from '@ember/service';
+import optionize from '@linc-technologies/ember-spreadsheet-export/utils/utils';
 import { saveAs } from 'file-saver';
 import XLSX from 'xlsx';
-import optionize from '../utils/utils';
 
 const defaultConfig = {
   sheetName: 'Sheet1',

tests/test-helper.js

@@ -1,5 +1,5 @@
-import Application from '../app';
-import config from '../config/environment';
+import Application from '@linc-technologies/ember-spreadsheet-export/app';
+import config from '@linc-technologies/ember-spreadsheet-export/config/environment';
 import { setApplication } from '@ember/test-helpers';
 import { start } from 'ember-qunit';