Fix rubocop warnings
Fix rubocop warnings

 * .rubocop.yml: Lint/EndAlignment has the wrong namespace - should be Layout
   * namespace chaged from Lint -> Layout

 * Warning: unrecognized cop Layout/SpaceInsideBrackets found in .rubocop.yml
   * Cop was deprecated and split into two separate cops:
     Layout/SpaceInsideReferenceBrackets and Layout/SpaceInsideArrayLiteralBrackets.
     I kept the functionality the same as before

References:
 * https://github.com/rubocop-hq/rubocop/blob/master/CHANGELOG.md#changes-9
 * https://rubocop.readthedocs.io/en/latest/cops_layout/#layoutspaceinsidereferencebrackets
 * https://rubocop.readthedocs.io/en/latest/cops_layout/#layoutspaceinsidearrayliteralbrackets

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