fix all webpack errors.

src/common/custom.d.ts

@@ -0,0 +1,4 @@
+declare module '*.svg' {
+  const content: any;
+  export default content;
+}

src/main/main.ts

@@ -1,7 +1,7 @@
 /**
  * Entry point of the Election app.
  */
-import { app, BrowserWindow, ipcMain, Event } from 'electron';
+import { app, BrowserWindow, Event, ipcMain } from 'electron';
 import * as os from 'os';
 import * as path from 'path';
 import * as url from 'url';
@@ -44,7 +44,7 @@ function createWindow(): void {
   }
 
   mainWindow.webContents.on('did-finish-load', (): void => {
-    mainWindow.webContents.send('getSales', data.getSales());
+    mainWindow!.webContents.send('getSales', data.getSales());
   });
 
   mainWindow.on('closed', () => {
@@ -54,14 +54,14 @@ function createWindow(): void {
 
 ipcMain.on('createSale', async (event: Event, arg: { sale: SaleInfo }) => {
   await data.createSale(arg.sale);
-  mainWindow.webContents.send('getSales', data.getSales());
+  mainWindow!.webContents.send('getSales', data.getSales());
 });
 
 ipcMain.on('deleteSale', async (event: Event, sale: SaleInfo) => {
   const sales: SaleInfo[] = data.getSales();
   const index: number = sales.indexOf(sale);
   await data.deleteSale(index);
-  mainWindow.webContents.send('getSales', data.getSales());
+  mainWindow!.webContents.send('getSales', data.getSales());
 });
 
 app.on('ready', createWindow);

src/renderer/components/addSale.tsx

@@ -174,7 +174,7 @@ export class AddSale extends React.Component<AddSaleProps, AddSaleState> {
 
   private addProduct(event: any): void {
     // tslint:disable: no-for-in
-    const state: AddSaleState = this.state;
+    const state: any = this.state;
     for (const value in state) {
       if (state[value] === '') {
         toast.error('Form is incomplete');

src/renderer/components/navbar.tsx

@@ -4,8 +4,8 @@
 import * as React from 'react';
 import { Link } from 'react-router-dom';
 
-import SettingsIcon from '@public/img/settings.svg';
 import HomeIcon from '@public/img/home.svg';
+import SettingsIcon from '@public/img/settings.svg';
 import '@public/scss/navbar.scss';
 
 type NavbarProps = {};

src/renderer/routes/Settings.tsx

@@ -67,7 +67,7 @@ export class Settings extends React.Component<SettingProps, SettingState> {
     );
   }
 
-  private showToast() {
+  private showToast(): void {
     toast.error('Stockx/Goat connections may be coming soon.');
   }
 }

tslint.json

@@ -13,6 +13,7 @@
         "ignore-case": true
       }
     ],
+    "no-non-null-assertion": false,
     "no-any": false,
     "no-unsafe-any": false,
     "import-name": false,