Add @typescript-eslint/parser & typescript to lint index.d.ts

package-lock.json

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+            "semver": "^7.3.2",
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       "resolved": "https://registry.npmjs.org/@typescript-eslint/typescript-estree/-/typescript-estree-2.34.0.tgz",
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       "resolved": "https://registry.npmjs.org/acorn/-/acorn-7.1.1.tgz",
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       "dev": true
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     "uri-js": {
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       "resolved": "https://registry.npmjs.org/uri-js/-/uri-js-4.2.2.tgz",

package.json

   },
   "devDependencies": {
     "@react-native-community/eslint-config": "^1.1.0",
+    "@typescript-eslint/parser": "^3.9.1",
     "babel-eslint": "^10.1.0",
     "eslint": "^6.8.0",
     "eslint-plugin-jsx": "^0.1.0",
     "eslint-plugin-react": "^7.20.3",
     "eslint-plugin-react-hooks": "^3.0.0",
-    "eslint-plugin-react-native": "^3.8.1"
+    "eslint-plugin-react-native": "^3.8.1",
+    "typescript": "^3.9.7"
   }
 }