componentWillMount and componentWillReceiveProps warnings in newer React

[kevgrig]

First, thank you very much for this project. I tried many different emoji providers and I finally decided to use yours. In newer expo/react, I see these warnings:

1. Warning: componentWillMount has been renamed, and is not recommended for use. See https://fb.me/react-unsafe-component-lifecycles for details.

   • Move code with side effects to componentDidMount, and set initial state in the constructor.
   • Rename componentWillMount to UNSAFE_componentWillMount to suppress this warning in non-strict mode. In React 17.x, only the UNSAFE_ name will work. To rename all deprecated lifecycles to their new names, you can run npx react-codemod rename-unsafe-lifecycles in your project source folder.

   Please update the following components: RecyclerListView

2. Warning: componentWillReceiveProps has been renamed, and is not recommended for use. See https://fb.me/react-unsafe-component-lifecycles for details.

   • Move data fetching code or side effects to componentDidUpdate.
   • If you're updating state whenever props change, refactor your code to use memoization techniques or move it to static getDerivedStateFromProps. Learn more at: https://fb.me/react-derived-state
   • Rename componentWillReceiveProps to UNSAFE_componentWillReceiveProps to suppress this warning in non-strict mode. In React 17.x, only the UNSAFE_ name will work. To rename all deprecated lifecycles to their new names, you can run npx react-codemod rename-unsafe-lifecycles in your project source folder.

   Please update the following components: RecyclerListView

3. Warning: componentWillMount has been renamed, and is not recommended for use. See https://fb.me/react-unsafe-component-lifecycles for details.

   • Move code with side effects to componentDidMount, and set initial state in the constructor.
   • Rename componentWillMount to UNSAFE_componentWillMount to suppress this warning in non-strict mode. In React 17.x, only the UNSAFE_ name will work. To rename all deprecated lifecycles to their new names, you can run npx react-codemod rename-unsafe-lifecycles in your project source folder.

   Please update the following components: ViewRenderer

[kevgrig]

Created PR #52