Update teact-native typings to react-native@0.34 (#11831)

* Update teact-native typings to react-native@0.34

* Address review feedback

- remove ES6 Promise definition
- replace class/type -> interface to match w/ existing definitions
- remove duplicated types: I18nManagerStatus and EmitterSubscription
Remove ES6 Promise definition

* Keep previous typings as react-native.0.29

react-native/tsconfig.json

@@ -0,0 +1,6 @@
+{
+    "compilerOptions": {
+        "target": "es6",
+        "noImplicitAny": true
+    }
+}