Format code with prettier

.prettierrc.json

package-lock.json

package.json

src/App.js

src/App.test.js

src/AuthContext.js

src/Dashboard.js

src/Fetcher.js

src/Head.js

src/MemberList.js

src/ProductList.js

src/ProductPicker.js

src/ShowTransaction.js

src/SignIn.js

src/Topup.js

src/TransactionList.js

src/index.js

src/order/CreateOrder.js

src/order/OrderList.js

src/order/PurchaseOrder.js