New CSS features

[Antonio-Laguna]

This adds support for

• Exponential Functions (pow(), sqrt(), hypot(), log(), exp()): https://www.w3.org/TR/css-values-4/#exponent-funcs
• calc() constants (e, pi, infinity, -infinity and NaN) https://www.w3.org/TR/css-values-4/#calc-constants
• Sign functions (abs() and sign()): https://www.w3.org/TR/css-values-4/#sign-funcs
• Trigonometric functions (sin(), cos(), tan(), asin(), acos(), atan() and atan2()): https://www.w3.org/TR/css-values-4/#trig-funcs

Needed for csstools/postcss-plugins#356

It also allows to manually override support for things that aren't yet on MDN nor Can I Use

[netlify]

✅ Deploy Preview for cssdb ready!

Name	Link
🔨 Latest commit	cc42903
🔍 Latest deploy log	https://app.netlify.com/sites/cssdb/deploys/626e92e28eeb610008c7ad65
😎 Deploy Preview	https://deploy-preview-130--cssdb.netlify.app/
📱 Preview on mobile	Toggle QR Code... Use your smartphone camera to open QR code link.

---

To edit notification comments on pull requests, go to your Netlify site settings.

[Antonio-Laguna]

@romainmenke if you can think of better examples it's more than welcome. The specs are very vague as they stand!

[romainmenke]

Two small suggestions. Rest looks great :)

Maybe we can adjust the examples after we implement the plugins?
This will give us the chance to take a deep dive into the feature first.