message: Add a function to append/overwrite objects in the config on the fly
  Intended to be used to overwrite settings which may be calculated rather than provided.
diff: @@ -41,6 +41,12 @@ class SdkConfig {
  static unset() {
  global.mxReactSdkConfig = undefined;
  }
  +
  + static add(cfg) {
  + const liveConfig = SdkConfig.get();
  + const newConfig = Object.assign({}, liveConfig, cfg);
  + SdkConfig.put(newConfig);
  + }
  }
  module.exports = SdkConfig;
  