v1.7.0

Added

• Add h1,h2,h3,h4,h5,h6 State mapping
• setFontSize Changes the font size for the selection or at the insertion point. This requires an integer from 1-7 as a value argument.
• setFontName Changes the font name for the selection or at the insertion point. This requires a font name string (like "Arial") as a value argument.

Fix

• Toolbar active/inactive
• Adjust the format of insertImage to solve the bug that the picture cannot be deleted