Adding `rem` converter DSL to Number primitive for correct styling units on RN platforms.

index.ts

import { Platform, StyleSheet } from 'react-native';

Object.defineProperty(Number.prototype, 'rem', {
  get: function() {
    switch (Platform.OS) {
      case 'web':
        return `${this.valueOf()}rem`;
      case 'macos':
      case 'windows':
      case 'ios':
      case 'android':
      default:
        return this.valueOf() * 16;
    }
  },
  enumerable: false,
});

const styles = StyleSheet.create({
  text: { fontSize: 1..rem },
  textContainer: {
    paddingVertical: 1..rem,
    paddingHorizontal: 1.5.rem,
    flexDirection: 'row',
    justifyContent: 'space-between',
    alignItems: 'center',
  },
})