Constant style::values::specified::font::FONT_STYLE_OBLIQUE_MAX_ANGLE_DEGREES

pub const FONT_STYLE_OBLIQUE_MAX_ANGLE_DEGREES: f32 = 90.;

From https://drafts.csswg.org/css-fonts-4/#valdef-font-style-oblique-angle:

Values less than -90deg or values greater than 90deg are
invalid and are treated as parse errors.

The maximum angle value that font-style: oblique should compute to.