chore: release 2.0.0

[release-please]

🤖 I have created a release *beep* *boop*

2.0.0 (2021-03-03)

⚠ BREAKING CHANGES

• deps: require 3.6+ (chore(deps)!: require 3.6+ #961)

Features

• Add support for using static discovery documents (#1109) (32d1c59)
• Update synth.py to copy discovery files from discovery-artifact-manager (#1104) (af918e8)

Bug Fixes

• Catch ECONNRESET and other errors more reliably (#1147) (ae9cd99)
• deps: add upper-bound google-auth dependency (#1180) (c687f42)
• handle error on service not enabled (#1117) (c691283)
• Improve support for error_details (#1126) (e6a1da3)
• MediaFileUpload error if file does not exist (#1127) (2c6d029)
• replace deprecated socket.error with OSError (#1161) (b7b9986)
• Use logging level info when file_cache is not available (#1125) (0b32e69)

Miscellaneous Chores

• deps: require 3.6+ (#961) (8325d24)

Documentation

• add networkconnectivity v1alpha1 (#1176) (91b61d3)
• Delete redundant oauth-web.md (#1142) (70bc6c9)
• fix MediaIoBaseUpload broken link (#1112) (334b6e6)
• fix regression with incorrect args order in docs (#1141) (4249a7b)
• fix typo in thread safety example code (#1100) (5ae088d)
• Reduce noisy changes in docs regen (#1135) (b1b0c83)
• update docs/dyn (#1096) (c2228be)
• update guidance on service accounts (#1120) (b2ea122)

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[busunkim96]

Do not merge, changes in #1109 are planned for this release.

[yoshi-automation]

Release is at https://github.com/googleapis/google-api-python-client/releases/tag/v2.0.0

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