User defined Unit

[Loque-]

Also has an unfortunate trailing comma update.

You can now specify the unit that Guttr will use when producing padding;

const siteGutter = guttr({
    base: {
        gutter: 1,
        unit: 'rem',
    },
    breakpoints: {
        small: {
            gutter: 16,
            unit: 'px',
            mediaQuery: `@media(min-width: 768px)`,
        },
        medium: {
            gutter: 4,
            // will return to base if not specified
            mediaQuery: `@media(min-width: 992px)`,
        },
    },
});