Update react-native-securerandom to 0.2.0

[SjarletK]

Hello,

The library react-native-securerandom version 0.1.1 has a type problem.
The index.js file contains typescript, but is not a ts file.

I have to manually remove the library in node_modules to be able to use pkg to package my application using your library as a dependency.

I will make a pull request (if you'll allow me) to change this, if you have other solutions I'll be happy to try them

Thanks!