Update dependency firebase-functions to v5

[renovate[bot]]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
firebase-functions	^4.0.0 -> ^5.0.0

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Release Notes

firebase/firebase-functions (firebase-functions)

v5.0.0

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• Add option to get named firestore instance for v2 firestore functions (#​1550).
• Remove firebase-admin v10 dependency for Firestore triggers multi-DB support (#​1555).

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)

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[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 35.02%. Comparing base (eb5953b) to head (8a05e00).

Additional details and impacted files

@@           Coverage Diff           @@
##           master     #262   +/-   ##
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  Coverage   35.02%   35.02%           
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  Files          97       97           
  Lines        4994     4994           
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  Hits         1749     1749           
  Misses       3245     3245           

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