Use lowerCamelCase in generated dart file

[iqfareez]

This is just a linter warning, but it will be nice to be implemented

Instead of

static const IconData tasbih_plain = IconData(0xe800, fontFamily: _kFontFam, fontPackage: _kFontPkg);

It can be

static const IconData tasbihPlain = IconData(0xe800, fontFamily: _kFontFam, fontPackage: _kFontPkg);