Issue #2400407 by hussainweb: Update masterminds/html5 to latest release

core/composer.lock

core/vendor/composer/ClassLoader.php

core/vendor/composer/include_paths.php

core/vendor/composer/installed.json

core/vendor/masterminds/html5/.travis.yml

core/vendor/masterminds/html5/CREDITS

core/vendor/masterminds/html5/LICENSE.txt

core/vendor/masterminds/html5/README.md

core/vendor/masterminds/html5/RELEASE.md

core/vendor/masterminds/html5/UPGRADING.md

core/vendor/masterminds/html5/phpunit.xml.dist

core/vendor/masterminds/html5/src/HTML5/Parser/Tokenizer.php

...or/masterminds/html5/src/HTML5/Serializer/OutputRules.php

core/vendor/masterminds/html5/test/HTML5/Html5Test.php

...asterminds/html5/test/HTML5/Parser/DOMTreeBuilderTest.php

...dor/masterminds/html5/test/HTML5/Parser/UTF8UtilsTest.php

...sterminds/html5/test/HTML5/Serializer/OutputRulesTest.php