Webpack 5 support with updated packages (#131)

- Update to Webpack 5
- Use @effortlessmotion dynamic html and inline source plugins
- Remove .clasp.json and use SAMPLE file
- Consistent prettier formatting throughout
- Update packages to latest versions

Co-authored-by: Kevin Malakoff <kmalakoff@gmail.com>

src/client/dialog-demo-bootstrap/components/FormInput.tsx

@@ -2,9 +2,7 @@ import React, { useState, ChangeEvent, FormEvent } from 'react';
 import { Form, Button, Col, Row } from 'react-bootstrap';
 
 interface FormInputProps {
-  submitNewSheet: (
-    sheetName: string
-  ) => {
+  submitNewSheet: (sheetName: string) => {
     name: string;
     index: number;
     isActive: boolean;