Bump golang.org/x/oauth2 from 0.10.0 to 0.19.0

[dependabot[bot]]

Bumps golang.org/x/oauth2 from 0.10.0 to 0.19.0.

Commits

• d0e617c google: add Credentials.UniverseDomainProvider
• 3c9c1f6 oauth2/google: fix the logic of sts 0 value of expires_in
• 5a05c65 oauth2/google: fix remove content-type header from idms get requests
• 3a6776a appengine: drop obsolete code for AppEngine envs <=Go 1.11
• 85231f9 go.mod: update golang.org/x dependencies
• 34a7afa google/externalaccount: add Config.UniverseDomain
• 95bec95 google/externalaccount: moves externalaccount package out of internal and exp...
• ebe81ad go.mod: update golang.org/x dependencies
• adffd94 google/internal/externalaccount: update serviceAccountImpersonationRE to supp...
• deefa7e google/downscope: add DownscopingConfig.UniverseDomain to support TPC
• Additional commits viewable in compare view

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