Optionalbold?: boolean | nullSets the weight to 700 or 400. Ignored when weight is also given.
Optionalitalic?: boolean | nullSets the style to italic or normal. Ignored when style is also given.
Optionalunderline?: IFont.UnderlineStyle | boolean | nulltrue for 'single', false for 'none'.
Optionalweight?: number | string | nullA number (400, 700) or a CSS keyword ('bold').
What IFontStyle.update and a cell style's
fontaccept: Properties with shorthands.nullclears a property.