config files for RN>0.57.4, including typescript (rn-cli.config.js, tsconfig.json)

babel.config.js

module.exports = function (api) {
  api.cache(true)
    return {
        //decoratorsBeforeExport
        "presets": ["module:metro-react-native-babel-preset"],
        "plugins": [
            ["module-resolver", {
                "root": ["./src"],
                "extensions": [".js", ".ts", ".tsx", ".ios.js", ".android.js"]
            }],
            "@babel/plugin-transform-runtime",
            "@babel/plugin-transform-flow-strip-types",
            ["@babel/plugin-proposal-decorators", { "legacy": true }],
            ["@babel/plugin-proposal-class-properties", { "loose": true }],
            //"@babel/plugin-transform-regenerator",
            //"@babel/plugin-transform-async-to-generator",
            //"@babel/plugin-transform-runtime"
        ],
        //"sourceMaps": true,
        "env": {
            "production": {
                "plugins": ["transform-remove-console"]
            }
        }
    };
}

//  https://github.com/facebook/react-native/issues/21475#issuecomment-432509636

rn-cli.config.js

module.exports = {
    transformer: {
        babelTransformerPath: require.resolve('react-native-typescript-transformer')
    },
    getSourceExts() {
        return ["ts", "tsx"];
    }
}

tsconfig.json

{
  "compilerOptions": {
    "outDir": "./transpiled",
    "baseUrl": ".",
    //"noEmitOnError": false,
    "allowJs": true,
    "experimentalDecorators": true,
    "allowSyntheticDefaultImports": true,
    "esModuleInterop": true,
    "isolatedModules": true,
    "jsx": "react-native",
    "lib": [ "es6" ],
    "moduleResolution": "node",
    "noEmit": true,
    "strict": true,
    "target": "esnext",
    "types": [
      "jest",
      "lodash",
      "react",
      "react-native",
      "react-test-renderer"
    ],
    "paths": {}
  },
  "exclude": [ "node_modules", "**/deprecated/*", "**/deprecated/**/*" ]
}

you need to install dependencies:

"devDependencies": {
    "@babel/core": "^7.2.2",
    "@babel/plugin-proposal-class-properties": "^7.2.3",
    "@babel/plugin-proposal-decorators": "^7.2.3",
    "@babel/plugin-transform-runtime": "^7.2.0",
    "babel-plugin-module-resolver": "^3.1.3",
    "babel-plugin-transform-decorators-legacy": "^1.3.5",
    "babel-plugin-transform-remove-console": "^6.9.4",
    "react-native-typescript-transformer": "^1.2.11",
    "typescript": "^3.3.3"
  },