fix(deps): update dependency rxdb to v8.9.0

[renovate]

This PR contains the following updates:

Package	Change	Age	Confidence
rxdb (source)	8.7.3 → 8.9.0

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Release Notes

pubkey/rxdb (rxdb)

v8.9.0

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Other:

• The server plugin now exposes the pouchApp #​1992 Thanks @​Julusian

Features:

• Added option to replicate revisions with graphql-replication #​2000 Thanks @​gautambt

v8.8.0

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Other:

• Upgraded PouchDB and other dependencies

v8.7.5

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Other:

• Added a new example for electron with the remote API. Thanks @​SebastienWae
• Fixed Typing error on database.dump() #​1754. Thanks @​PVermeer

Bugfixes:

• Updates to documents fail with GraphQL replication. #​1812. Thanks @​gautambt
• RxQuery.doesDocumentDataMatch() was wrong on queries with $and which lead to a wrong result with QueryChangeDetection

v8.7.4

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Other:

• Improved performance of QueryChangeDetection by using array-push-at-sort-position instead of re-sorting the whole results of a query
• Improved performance by removing unnecessary calls to deep-clone

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