Update symfony/yaml requirement from ^4.0 to ^4.3

[dependabot-preview[bot]]

Updates the requirements on symfony/yaml to permit the latest version.

Changelog

*Sourced from [symfony/yaml's changelog](https://github.com/symfony/yaml/blob/master/CHANGELOG.md).* > CHANGELOG > ========= > > 5.0.0 > ----- > > * Removed support for mappings inside multi-line strings. > * removed support for implicit STDIN usage in the `lint:yaml` command, use `lint:yaml -` (append a dash) instead to make it explicit. > > 4.4.0 > ----- > > * Added support for parsing the inline notation spanning multiple lines. > * Added support to dump `null` as `~` by using the `Yaml::DUMP_NULL_AS_TILDE` flag. > * deprecated accepting STDIN implicitly when using the `lint:yaml` command, use `lint:yaml -` (append a dash) instead to make it explicit. > > 4.3.0 > ----- > > * Using a mapping inside a multi-line string is deprecated and will throw a `ParseException` in 5.0. > > 4.2.0 > ----- > > * added support for multiple files or directories in `LintCommand` > > 4.0.0 > ----- > > * The behavior of the non-specific tag `!` is changed and now forces > non-evaluating your values. > * complex mappings will throw a `ParseException` > * support for the comma as a group separator for floats has been dropped, use > the underscore instead > * support for the `!!php/object` tag has been dropped, use the `!php/object` > tag instead > * duplicate mapping keys throw a `ParseException` > * non-string mapping keys throw a `ParseException`, use the `Yaml::PARSE_KEYS_AS_STRINGS` > flag to cast them to strings > * `%` at the beginning of an unquoted string throw a `ParseException` > * mappings with a colon (`:`) that is not followed by a whitespace throw a > `ParseException` > * the `Dumper::setIndentation()` method has been removed > * being able to pass boolean options to the `Yaml::parse()`, `Yaml::dump()`, > `Parser::parse()`, and `Dumper::dump()` methods to configure the behavior of > the parser and dumper is no longer supported, pass bitmask flags instead > * the constructor arguments of the `Parser` class have been removed > * the `Inline` class is internal and no longer part of the BC promise > * removed support for the `!str` tag, use the `!!str` tag instead > * added support for tagged scalars. > ... (truncated)

Commits

- [`41e1635`](https://github.com/symfony/yaml/commit/41e16350a2a1c7383c4735aa2f9fce74cf3d1178) bug [#33517](https://github-redirect.dependabot.com/symfony/yaml/issues/33517) [Yaml] properly catch legacy tag syntax usages (xabbuh) - [`2d43e0d`](https://github.com/symfony/yaml/commit/2d43e0d14ca9a7a445070556e7760f577be699bf) properly catch legacy tag syntax usages - [`24075a7`](https://github.com/symfony/yaml/commit/24075a793215a4984b006660cdbf0bcd2c37fe0e) Merge branch '3.4' into 4.3 - [`768f817`](https://github.com/symfony/yaml/commit/768f817446da74a776a31eea335540f9dcb53942) don't dump a scalar tag value on its own line - [`9973789`](https://github.com/symfony/yaml/commit/9973789d0aeb92c057d1bbf676740ec06f9075cf) Merge branch '3.4' into 4.3 - [`717182d`](https://github.com/symfony/yaml/commit/717182d370fe00bf9268f9cd13e492976fa851bb) fix dumping not inlined scalar tag values - [`5a0b7c3`](https://github.com/symfony/yaml/commit/5a0b7c32dc3ec56fd4abae8a4a71b0cf05013686) Fix inconsistent return points. - [`8574112`](https://github.com/symfony/yaml/commit/8574112e34d6884285f1fae54c68d15e695909b0) Merge branch '3.4' into 4.3 - [`3dc414b`](https://github.com/symfony/yaml/commit/3dc414b7db30695bae671a1d86013d03f4ae9834) Fix inconsistent return points. - [`3836b11`](https://github.com/symfony/yaml/commit/3836b11260171ccbd88abad671e9ebaeedc47ddd) Merge branch '3.4' into 4.3 - Additional commits viewable in [compare view](https://github.com/symfony/yaml/compare/v4.0.0...v4.3.5)

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[Gummibeer]

@dependabot ignore this dependency

[dependabot-preview[bot]]

OK, I won't notify you about symfony/yaml again, unless you re-open this PR or update it yourself. 😢