build(deps): bump the dependencies group with 2 updates

[dependabot[bot]]

Bumps the dependencies group with 2 updates: symfony/polyfill-iconv and symfony/polyfill-mbstring.

Updates symfony/polyfill-iconv from 1.29.0 to 1.30.0

Commits

• c027e6a Revert "minor #477 Auto-close PRs on subtree-splits (kbond)"
• b9868ae Auto-close PRs on subtree-splits
• See full diff in compare view

Updates symfony/polyfill-mbstring from 1.29.0 to 1.30.0

Commits

• fd22ab5 Fix CS
• 3911b81 bug #479 [Mbstring] The first arg of mb_convert_encoding can be an array (ala...
• 59bfb48 [Mbstring] The first arg of mb_convert_encoding can be an array
• e642fbe Auto-close PRs on subtree-splits
• 64642e0 Add Mbstring::assertEncoding()
• 3cf9598 feature #466 [mbstring][PHP 8.4] Add mb_ucfirst and mb_lcfirst to polyfil...
• 2b48d52 [mbstring][PHP 8.4] Add mb_ucfirst and mb_lcfirst to polyfills
• e5e7ddb Update nullable types for PHP 8.4
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