add compatibility with es5's strict mode

[artempetrovcode]

The following code does not work in ES5's strict mode:

(function() {
  'use strict';
  reduxProps = {"models":[{}, {}]};
})();

The variables has to be declared before use:

(function() {
  'use strict';
  var reduxProps;
  reduxProps = {"models":[{}, {}]};
})();

[nacmartin]

Thanks @sttema !