Fix phpcs Errors and Warnings

PHPCS reported the following errors and warnings

FILE: /ui_patterns_miyagi/src/Plugin/Deriver/MiyagiDeriver.php
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FOUND 5 ERRORS AFFECTING 4 LINES
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 267 | ERROR | [x] Expected newline after closing brace
 267 | ERROR | [x] Use "elseif" in place of "else if"
 272 | ERROR | [x] Expected newline after closing brace
 323 | ERROR | [x] list(...) is forbidden, use [...] instead.
 387 | ERROR | [x] Opening brace should be on the same line as the declaration
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PHPCBF CAN FIX THE 5 MARKED SNIFF VIOLATIONS AUTOMATICALLY
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