Rule proposal: prefer-code-point

[fisker]

Prefer String#codePointAt() over String#charCodeAt()
Prefer String.fromCodePoint() over String.fromCharCode()

Fail

const unicorn = '🦄'.charCodeAt(0).toString(16)
// -> 'd83e'

const unicorn = String.fromCharCode(0x1f984)
// -> '濾'

Pass

const unicorn = '🦄'.codePointAt(0).toString(16)
// -> '1f984'

const unicorn = String.fromCodePoint(0x1f984)
// -> '🦄'

This rule should use suggestions instead of auto-fix.

[fregante]

This rule should use suggestions instead of auto-fix.

Why? Only due to support?

[fisker]

Because it result differently.

[sindresorhus]

This is now accepted.