Suggestiongs for next major release breaking changes

[HackbrettXXX]

• Don't flip width/height if format parameter does not fit dimensions. The orientation parameter only makes sense if a fixed page format like "a4" is provided. (e.g. #3066).
• Make some hotfixes the default behavior.
• Maybe make pt the default unit (scale factor 1).
• Get rid of floatPrecision option in favor of precision.
• Redesign getFontList API with separate font style and font weight
• Get rid of synchronous XHRs and make the respective APIs return a Promise.
• Clean up html API. Make it return a proper Promise.
• Maybe deprecate or remove setTextColor - it's the same as setFillColor
• set/getFontSize should use current document unit, not always pt. Same for similar functions like getLineHeight.