Null as data in _convertCase throws an error

[stefanvanherwijnen]

"Cannot convert undefined or null to object"
There should be a check for data != null

[stefanvanherwijnen]

The problem seems to be in the transform function. An extra check for value seems to fix it, i.e.:

    if (typeof data === 'object') {
      converted = transform(
        data,
        (result, value, key) => {
          if (value && typeof value === 'object') {
            result[this._convertCase(key, convertCaseOptions)] = this._convertCase(
              value,
              convertCaseOptions
            );
          } else {
            result[this._convertCase(key, convertCaseOptions)] = value;
          }
          return result;
        },
        {}
      );
    }