chore: release 7.0.0

[release-please]

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

7.0.0 (2021-02-08)

⚠ BREAKING CHANGES

• integrates external_accounts with GoogleAuth and ADC (feat!: integrates external_accounts with GoogleAuth and ADC #1052)
• workload identity federation support (feat!: workload identity federation support #1131)

Features

• adds service account impersonation to ExternalAccountClient (#1041) (997f124)
• adds text/json credential_source support to IdentityPoolClients (#1059) (997f124)
• defines ExternalAccountClient used to instantiate external account clients (#1050) (997f124)
• defines IdentityPoolClient used for K8s and Azure workloads (#1042) (997f124)
• defines ExternalAccountClient abstract class for external_account credentials (#1030) (997f124)
• get AWS region from environment variable (#1067) (997f124)
• implements AWS signature version 4 for signing requests (#1047) (997f124)
• implements the OAuth token exchange spec based on rfc8693 (#1026) (997f124)
• integrates external_accounts with GoogleAuth and ADC (#1052) (997f124)
• workload identity federation support (#1131) (997f124)

Bug Fixes

• deps: update dependency puppeteer to v6 (#1129) (5240fb0)
• deps: update dependency puppeteer to v7 (#1134) (02d0d73)

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[codecov]

Codecov Report

Merging #1135 (7982333) into master (309dab3) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master    #1135   +/-   ##
=======================================
  Coverage   93.74%   93.74%           
=======================================
  Files          28       28           
  Lines        6253     6253           
  Branches      654      609   -45     
=======================================
  Hits         5862     5862           
  Misses        391      391           

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[yoshi-automation]

Release is at https://github.com/googleapis/google-auth-library-nodejs/releases/tag/v7.0.0

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