deps: update dependency diagram-js to v15

[renovate]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
diagram-js	^14.11.3 -> ^15.0.0

---

Release Notes

bpmn-io/diagram-js (diagram-js)

v15.1.0

Compare Source

• FEAT: integrate popup-menu with search (#​932)
• FEAT: recognize modern search tokens in search-pad (#​932)
• FEAT: improve search types (#​932)
• FIX: correctly handle duplicate entries and whitespace in search (#​932)
• FIX: find search terms across all keys (#​932)
• FIX: search always returns tokens for matched items (#​932)

v15.0.0

Compare Source

• FEAT: make canvas browser selectable (#​659)
• FEAT: make keyboard binding implicit (#​661)
• FEAT: make multi-selection outline an outline concern (#​944)

Breaking Changes

• Keyboard binding target can no longer be chosen. Configure keyboard binding via the keyboard.bind configuration and rely on keybindings to work if the canvas has browser focus. (#​661)
• The Canvas is now a focusable component, that is recognized accordingly by the browser, with all benefits for UX and interaction. Components that pull focus from the Canvas during modeling must ensure to restore the focus (if intended), via Canvas#restoreFocus. (#​661)
• The selection feature does not provide visual outline by default anymore. Use the outline feature to re-enable it. (#​944)

---

Configuration

📅 Schedule: Branch creation - "after 10pm,before 5:00am" (UTC), Automerge - At any time (no schedule defined).

🚦 Automerge: Disabled by config. Please merge this manually once you are satisfied.

♻ Rebasing: Whenever PR becomes conflicted, or you tick the rebase/retry checkbox.

🔕 Ignore: Close this PR and you won't be reminded about this update again.

---

• If you want to rebase/retry this PR, check this box

---

This PR was generated by Mend Renovate. View the repository job log.