Support React@18

[sacru2red]

Version

Write the version that you are currently using. latest (@toast-ui/[email protected])

Development Environment

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Current Behavior

Write a description of the current operation. You can add sample code, 'CodePen' or 'jsfiddle' links.

// https://github.com/nhn/tui.editor/blob/0c5c11bac0b9954e2cac2ff2a081ce8c80a5f14d/apps/react-editor/package.json#L30
"peerDependencies": {
    "react": "^17.0.1"
  },

// Write example code

Expected Behavior

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support react@18