Update dependency google/GoogleUtilities to v8

[renovate]

This PR contains the following updates:

Package	Update	Change
google/GoogleUtilities	major	7.13.2 -> 8.1.0

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Release Notes

google/GoogleUtilities (google/GoogleUtilities)

v8.1.0

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• Add a utility to detect App Clips and make a semantic check for background
  URL sessions. (#​220)

v8.0.2

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• Fix default logging level regression introduced in 8.0.0 (no value set);
  default value is restored to GULLoggerLevelNotice. (#​207)

v8.0.1

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• Add missing copyright to source file. (#​206)
• Removed an extraneous #undef GUL_LOGGING_FUNCTION. (#​205)

v8.0.0

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• Remove swizzling support for application:didReceiveRemoteNotification:.
  Use application:didReceiveRemoteNotification:fetchCompletionHandler: instead. (#​162)
• Remove GULHeartbeatDateStorable, GULHeartbeatDateStorage,
  GULHeartbeatDateStorageUserDefaults APIs. (#​164)
• Remove '+ [GULAppEnvironmentUtil isIOS7OrHigher]' API. (#​165)
• Remove '+ [GULAppEnvironmentUtil hasSwiftRuntime]' API. (#​166)
• Fix an issue where ObjC associated objects were sometimes set with a
  non-const key, potentially resulting in undefined behavior. (#​141)
• Add nullabilty annotations to public headers. (#​169)
• Remove references to deprecated CTCarrier. (#​106)
• [changed] Breaking change: Minimum supported versions have
  updated for the following platforms:

  • Platform	GoogleUtilities 8.0
    iOS	12.0
    tvOS	13.0
    macOS	10.15
    watchOS	7.0

• Remove dependency on FBLPromises. The following public API have
  been removed:
  • - [NSURLSession gul_dataTaskPromiseWithRequest:]
  • GULURLSessionDataResponse
    The following promise-based public API have been replaced with
    completion handler-based alternatives.
  • - [GULKeychainStorage getObjectForKey:objectClass:accessGroup:]
  • - [GULKeychainStorage setObject:forKey:accessGroup:]
  • - [GULKeychainStorage removeObjectForKey:accessGroup:]
  • Update underlying GULLogger implementation from asl to os_log.
  • Remove GULLoggerEnableSTDERR API.

v7.13.3

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• Rename parameter placeholder in GULSecureCoding unarchiving API to avoid
  conflict with keyword. (#​152)
• Reorganize privacy manifests for SwiftPM so that each library target has its
  own privacy manifest, as opposed to transitively depending on a common one.
  (#​150)

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