Swift-5.4.12

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• [D] doc
• [D] lib
• [D] tests
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• [F] .gitignore
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• [F] .php_cs.dist
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• [F] .travis.yml
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• [F] CHANGES
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• [F] composer.json
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• [F] LICENSE
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• [F] phpunit.xml.dist
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• [F] README
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• [F] VERSION
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