Replace the existing `jest` key in the dictionary with this code.

package.json

"jest": {
  "preset": "react-native",
  "transform": {
    "^.+\\.js$": "<rootDir>/node_modules/react-native/jest/preprocessor.js",
    "^.+\\.tsx?$": "ts-jest"
  },
  "globals": {
    "ts-jest": {
      "tsConfigFile": "tsconfig.jest.json"
    }
  },
  "testRegex": "(/__tests__/.*|(\\.|/)(test|spec))\\.(jsx?|tsx?)$",
  "moduleFileExtensions": [
    "ts",
    "tsx",
    "js",
    "jsx",
    "json",
    "node"
  ],
  "modulePaths": [
    "<rootDir>"
  ],
  "setupFiles": [
    "./tests/setup.js"
  ]
}