New rule: no duplicated hooks

[eranshabi]

A rule that disallows duplicated hooks in the same describe.
For example this code will fail, because you should combine the two beforeEachs into one:

describe('my describe', () => {
    beforeEach(() => {...});
    beforeEach(() => {...});

    it('my it', () => {...})
});

[SimenB]

I like it! Wanna send a PR?

[Mark1626]

I'll raise a PR for this

[Mark1626]

@SimenB raised a PR for this

[SimenB]

🎉 This issue has been resolved in version 22.8.0 🎉

The release is available on:

• npm package (@latest dist-tag)
• GitHub release

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