Bold textStyle attribute of textview in xml is not working after applying custom fonts in app Android

Bold textStyle attribute of textview in xml is not working after applying custom fonts in app

I have completed developement of an android app. Now I have to change font family for whole app. I have used baskerville-old-face.ttf fonts and used Calligraphy library to apply these fonts into my app. Following is dependency I have used:

compile 'uk.co.chrisjenx:calligraphy:2.2.0'

Following is the code to initilize Calligraphy library:

CalligraphyConfig.initDefault(new CalligraphyConfig.Builder().setDefaultFontPath("fonts/baskerville.ttf").setFontAttrId(R.attr.fontPath).build());

And following is the code I have used in each Avtivity to use custom fonts:

@Override
protected void attachBaseContext(Context newBase) {
    super.attachBaseContext(CalligraphyContextWrapper.wrap(newBase));
}

It is working fine and all fonts are changed but there is only one problem that text style (bold) is not working with xml attribute. I don't want to change each textview attribute programmatically (Using JAVA code) because there are more than 100 text views in my whole app.

I am not getting what I am doing wrong or what I am missing. Please help !

Your help will be highly appreciated. Thank you.