Update tfjs-react-native to 0.7.0. (#5638)

Author: jinjingforever

tfjs-react-native/package.json

@@ -1,6 +1,6 @@
 {
   "name": "@tensorflow/tfjs-react-native",
-  "version": "0.0.0",
+  "version": "0.7.0",
   "description": "TensorFlow.js platform implementation for React Native",
   "main": "dist/index.js",
   "types": "dist/index.d.ts",

tfjs-react-native/src/version.ts

@@ -1,5 +1,5 @@
 /** @license See the LICENSE file. */
 
 // This code is auto-generated, do not modify this file!
-const version = '0.2.3';
+const version = '0.7.0';
 export {version};