Fix PropTypes import in TodoTextInput.js

Author: devin-ai-integration[bot]

src/components/TodoTextInput.js

@@ -1,4 +1,5 @@
-import React, {Component, PropTypes} from 'react'
+import React, { Component } from 'react'
+import PropTypes from 'prop-types'
 import classnames from 'classnames'
 
 export default class TodoTextInput extends Component {