Fix webpack build

Author: hoogi91

Resources/Private/Assets/JavaScript/dsn.js

@@ -1,4 +1,4 @@
-import {colHeaderToIndex} from "./helper";
+import {colHeaderToIndex} from "./helper.js";
 
 export default class DSN {
     constructor(value) {

Resources/Private/Assets/JavaScript/main.js

@@ -1,7 +1,7 @@
-import DSN from './dsn';
-import Renderer from './renderer';
-import Spreadsheet from './spreadsheet';
-import Selector from "./selector";
+import DSN from './dsn.js';
+import Renderer from './renderer.js';
+import Spreadsheet from './spreadsheet.js';
+import Selector from "./selector.js";
 import DocumentService from 'DocumentService';
 
 class SpreadsheetDataInput {

Resources/Private/Assets/JavaScript/renderer.js

@@ -1,5 +1,5 @@
-import DSN from "./dsn";
-import {colHeaderByIndex} from "./helper";
+import DSN from "./dsn.js";
+import {colHeaderByIndex} from "./helper.js";
 
 export default class Renderer {
     constructor(sheetWrapper, tableWrapper) {

Resources/Private/Assets/JavaScript/selector.js

@@ -1,4 +1,4 @@
-import {calculateCellIndexes, cellRepresentation, throttle, unselectEverything} from "./helper";
+import {calculateCellIndexes, cellRepresentation, throttle, unselectEverything} from "./helper.js";
 
 export default class Selector {
     constructor(tableWrapper) {

Resources/Private/Assets/JavaScript/spreadsheet.js

@@ -1,4 +1,4 @@
-import DSN from './dsn';
+import DSN from './dsn.js';
 
 export default class Spreadsheet {
     constructor(dsn, data) {