fix(deps): update dependency firebase-functions to ^4.9.0

[renovate]

This PR contains the following updates:

Package	Change	Age	Confidence
firebase-functions	^4.4.1 → ^4.9.0

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Release Notes

firebase/firebase-functions (firebase-functions)

v4.9.0

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• Add new 2nd gen Firestore auth context triggers. (#​1519)

v4.8.2

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Fix bug with CORS options for an array of one string (#​1544)

v4.8.1

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Fix bug where 1st gen functions eventually fail with stack too deep (#​1540)
Make simple CORS options static for improved debugability (#​1536)

v4.8.0

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Add onInit callback function for global variable initialization (#​1531)

v4.7.0

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• Fixes access on deeply nested, nonexistent property. (#​1432)
• Add IteratedDataSnapshot interface to match with firebase admin v12 (#​1517).
• Make bucket parameterizeable in storage functions (#​1518)
• Introduce helper library for select and multi-select input (#​1518)

v4.6.0

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• Wrap 2nd gen onCall functions with trace context. (#​1491)
• Bump peer depdencies for firebase-admin to support 12.0.0. (#​1509)

v4.5.0

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• Remove HTTP server shutdown message. (#​1457)
• Add features to task queue functions. (#​1423)
• Add traces to V2 Firestore trigger logs. (#​1440)
• Fix incorrectly parsed timestamps in auth blocking functions. (#​1472)
• Add recaptcha verdict support for auth blocking functions (#​1458)

v4.4.1

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• Update list of supported regions for 2nd Gen Functions. (#​1402)
• Fix bug where log message on structured log was being overwritten (#​1416)
• Fix bug where exists() should return true for falsy values like 0, "" (#​1410)

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