Prepare v5.2.0

[nikku]

Proposed Changes

Bumps dependencies + prepares v5.2.0 release. A lot of fixed upstream bugs depend on this.

Search now works reliably, with UX improvements:

Properties panel can now be focused, so undo/redo is possible also outside of inputs:

Checklist

To ensure you provided everything we need to look at your PR:

• Brief textual description of the changes present
• Visual demo attached
• Steps to try out present, i.e. using the @bpmn-io/sr tool
• Related issue linked via Closes {LINK_TO_ISSUE} or Related to {LINK_TO_ISSUE}