New: Add prefer-exponentiation-operator rule (fixes #10482)

[mdjermanovic]

What is the purpose of this pull request? (put an "X" next to item)

[X] New rule #10482

Examples of incorrect code for this rule:

/*eslint prefer-exponentiation-operator: "error"*/

const foo = Math.pow(2, 8);

const bar = Math.pow(a, b);

let baz = Math.pow(a + b, c + d);

let quux = Math.pow(-1, n);

Examples of correct code for this rule:

/*eslint prefer-exponentiation-operator: "error"*/

const foo = 2 ** 8;

const bar = a ** b;

let baz = (a + b) ** (c + d);

let quux = (-1) ** n;

What changes did you make? (Give an overview)

New prefer-exponentiation-operator rule with the autofix.

Is there anything you'd like reviewers to focus on?

• The category should be "Stylistic Issues"?
• Should the autofix add spaces around **?

[mysticatea]

LGTM, thank you!

[platinumazure]

Looks good!

No need to worry about space around the exponentiation operator: that responsibility probably belongs to space-infix-ops.

[kaicataldo]

LGTM, thanks!