Release-v3.1.1

What's Changed

• fix URL in reset mixin & update version of library by @krypton225 in #87
• chore(upgrade): ⬆️ upgrade dependencies to latest versions by @krypton225 in #88
• Add first-last mixin to select first & last children. by @krypton225 in #89
• Add odd mixin to select only odd children of an element by @krypton225 in #90

Full Changelog: Release-v3.0.0...Release-v3.1.1