Update dependency requests-oauthlib to v2

This MR contains the following updates:

Package	Update	Change
requests-oauthlib	major	==1.3.1 -> ==2.0.0

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Release Notes

requests/requests-oauthlib (requests-oauthlib)

v2.0.0

Compare Source

v1.4.1

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v1.4.0

Compare Source

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