Update dependency google-auth-oauthlib to v0.5.2

[renovate[bot]]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
google-auth-oauthlib	==0.4.0 -> ==0.5.2

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Release Notes

GoogleCloudPlatform/google-auth-library-python-oauthlib

v0.5.2

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Documentation

• fix changelog header to consistent size (#​204) (cbd7d67)

v0.5.1

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Bug Fixes

• avoid deprecated "out-of-band" authentication flow (#​186) (f119c4e)

v0.5.0

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Features

• deprecate OAuth out-of-band flow (#​175) (1fb16be)

v0.4.6

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Bug Fixes

• remove dependency on six (#​146) (c338733), closes #​145

v0.4.5

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Documentation

• fix links to installed app, client secrets docs (#​86) (e8e5dbb), closes #​85
• omit mention of Python 2.7 in 'CONTRIBUTING.rst' (#​1127) (#​126) (8806324), closes #​1126
• add Samples section to CONTRIBUTING.rst (#​134) (1599a97)

Miscellaneous Chores

• release as 0.4.5 (#​137) (a54f283)

v0.4.4

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Bug Fixes

• add redirect_uri_trailing slash param to run_local_server (#​111) (666863a)

v0.4.3

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Bug Fixes

• add charset-utf-8 to response header (#​104) (53e31e2)
• deps: add lower bounds to all dependencies (#​99) (5587c6a)

v0.4.2

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Bug Fixes

• don't open browser if port is occupied (#​92) (0004057), closes #​75

v0.4.1

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08-26-2019 13:25 PDT

Implementation Changes

• Don't auto-generate code_verifier by default. (#​48)

Internal / Testing Changes

• Add renovate.json (#​56)

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