Configure hash style

[gbp]

Allow shorthand syntax but allow key values need to be consistent.

Good:

  { foo: 'foo', bar: 'bar' }

Good:

  foo = 'foo'; bar = 'bar'
  { foo:, bar: }

Bad:

  foo = 'foo', bar = 'bar'
  { foo:, bar: bar }

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[skip changelog]

[gbp]

This was getting annoying, the linter in my editor keeps saying "Omit hash value".