message: [crispy::text] Font: adds isScalable()
diff: @@ -188,6 +188,7 @@ class Font {
  int underlineThickness() const noexcept;
  bool isFixedWidth() const noexcept { assert(face_); return face_->face_flags & FT_FACE_FLAG_FIXED_WIDTH; }
  + bool isScalable() const noexcept { assert(face_); return face_->face_flags & FT_FACE_FLAG_SCALABLE; }
  // ------------------------------------------------------------------------
  unsigned glyphIndexOfChar(char32_t _char) const noexcept { assert(face_); return FT_Get_Char_Index(face_, _char); }
  