fix(deps): update dependency cozy-realtime to v4.2.8

This MR contains the following updates:

Package	Type	Update	Change
cozy-realtime (source)	dependencies	patch	4.2.5 -> 4.2.8

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Release Notes

cozy/cozy-libs

v4.2.8

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Bug Fixes

• Expose sendNotification from cozy-client realtime plugin (82500b4)

v4.2.7

Compare Source

Note: Version bump only for package cozy-realtime

v4.2.6

Compare Source

4.2.6 (2022-10-03)

Note: Version bump only for package cozy-realtime

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