⬆️ Update zwave-js/zwave-js-ui to v8.21.0

[renovate]

This PR contains the following updates:

Package	Update	Change
zwave-js/zwave-js-ui	minor	v8.20.0 -> v8.21.0

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Release Notes

zwave-js/zwave-js-ui (zwave-js/zwave-js-ui)

v8.21.0: Release 8.21.0

Compare Source

Bug Fixes

• add destroyed flag to client to prevent edge case on reconnect (e83b146)
• minor typo in ping and heal messages (#​3170) (3c7be58)
• ui: cleaner alert message on NVM backup (52d7766)
• ui: warn user before healing a node (edc0125), closes #​3175
• user callbacks on the server are set too early when recovering from a serial disconnect (2a8bf03), closes #​3174

Features

• bump zwave-js@11.5.0 (06ac54a)
• cache recently executed driver functions (36b915c), closes #​3160
• exponential backoff when restarting driver (#​3173) (1f0f63c)
• use new lastSeen zwaveNode prop (#​3178) (9851875)

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