📎 Implement eslint/prefer-object-spread

[Conaclos]

Description

Implement eslint/prefer-object-spread.

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See also the related discussion.

Note: we have to decide if we name the rule noObjectAssign or useObjectSpread.
noObjectAssign could mean banning all calls to Object.assign (that is not intended by the rule we want to implement). Unfortunately, useObjectSpread could (should?) cover more cases - not sure the ones it could cover.

[Conaclos]

@kbkn3 Can I assign it to you?

[kbkn3]

@Conaclos
ok! I'll try.