Relevanssi Premium v2.29.0

* Security: Fixes a vulnerability where a contributor-level user could make a SQL injection. * Minor fix: Correct broken cases where there are parameters after Relevanssi click-tracking parameters. * Minor fix: Remove errors from using some language codes without a country identifier. * Minor fix: The `relevanssi_missing_sort_key` hook did not fire for `menu_order`. It does now, if `menu_order` is 0. * Minor fix: Pinning weights did not work if the pinned word was in upper case. This case-sensitivity is now removed. * Minor fix: Click tracking is disabled in related posts fetching. * Minor fix: Relevanssi now ignores the contents of SVG tags. * Minor fix: Synced pattern contents are now indexed recursively so that, for example, the `relevanssi_noindex` class works. * Minor fix: Relevanssi no longer breaks image cloning in MultilingualPress.