EasyLoading.show style for user

[jcleng]

Describe the Feature request
hope EasyLoading.show add textDirection parameter,like this

      code for:
      ```dart
      ...
      children: <Widget>[
        widget.indicator != null
            ? Container(
                margin: _status?.isNotEmpty == true
                    ? EasyLoadingTheme.textPadding
                    : EdgeInsets.zero,
                child: widget.indicator,
              )
            : null,
        _status?.isNotEmpty == true
            ? Text(
                _status,
               // for this
                style: textStyle,
                textAlign: EasyLoadingTheme.textAlign,
              )
            : null,
      ].where((w) => w != null).toList(),
      ...
      ```

[nslogx]

@jcleng v1.2.0 has been published, included textStyle option