Issue #3433535: Automated Drupal 11 compatibility fixes for multiselect

This merge request was automatically created by the Project Update Bot. It contains the changes from run 11-127659.

changed title from Automated Project Update Bot fixes to Issue #3433535: Automated Drupal 11 compatibility fixes for multiselect

added 12 commits

• 16fabe13...99b8689c - 11 commits from branch project:2.x
• 892bc06b - Automated Project Update Bot fixes from run 11-127659.

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added 1 commit

• 0245a0f1 - Opt into testing on next major (D11).

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added 1 commit

• 749b79cb - Mark test module comptaible with D11; stop testing D9 since we dropped support.

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added 1 commit

• a41faf11 - Try adding support for D9 back.

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started a merge train

merged