message: Created contexts in App.tsx for snapshotHistoryContext, selectedContext, and filter
  Still need to provide contexts and type and reference them in later child components
diff: -import React, {useState, useEffect} from 'react';
  +import React, {useState, useEffect, createContext} from 'react';
  import MainContainer from '../Containers/MainContainer';
  import {stateSnapshot, selectedTypes, stateSnapshotDiff} from '../../types';
  // importing the diff to find difference
  import {diff} from 'jsondiffpatch';
  +// contexts created for our state values to later reference in child components
  +// purpose is to eliminate prop drilling in later child components
  +export const snapshotHistoryContext = createContext<Partial<stateSnapshot[]>>(null);
  +export const selectedContext = createContext<Partial<selectedTypes[]>>(null);
  +export const filter = createContext<Partial<stateSnapshotDiff[]>>(null);
  const LOGO_URL = './assets/Recoilize.png';
  const App: React.FC = () => {
  