updated scripts in package.json and redeployed contracts

compiled and redeployed contract

updated package.json file

updated package.json file

updated package.json file

updated package.json file

updated package.json file

updated node version

updated react version in package.json file

removed yarn.lock file

updated bugs and added required folders

updated migrations folder

updated App.js file

updated readme.md file

updated truffle.config file