chore: release 2.0.0

[release-please]

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

2.0.0 (2020-04-20)

⚠ BREAKING CHANGES

• dropp support for custom promises (chore!: drop support for custom promises #970)
• convert to typescript (build!: convert to typescript #923)
• deps: update dependency @google-cloud/projectify to v2 (fix(deps)!: update dependency @google-cloud/projectify to v2 #929)

Bug Fixes

• remove eslint, update gax, fix generated protos, run the generator (#955) (544a061)
• close: ensure in-flight messages are drained (#952) (93a2bd7)
• deps: update dependency @google-cloud/paginator to v3 (#931) (b621854)
• deps: update dependency @google-cloud/precise-date to v2 (#934) (72b8d78)
• deps: update dependency @google-cloud/projectify to v2 (#929) (45d9880)
• deps: update dependency @google-cloud/promisify to v2 (#928) (3819877)
• deps: update dependency google-auth-library to v6 (#935) (73fc887)

Miscellaneous Chores

• dropp support for custom promises (#970) (df462d3)

Build System

• convert to typescript (#923) (2fc68ba)

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This PR was generated with Release Please.

[codecov]

Codecov Report

Merging #946 into master will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master     #946   +/-   ##
=======================================
  Coverage   95.29%   95.29%           
=======================================
  Files          22       22           
  Lines       10618    10618           
  Branches      465      465           
=======================================
  Hits        10118    10118           
  Misses        497      497           
  Partials        3        3           

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[publish-bot]

A candidate release, 2.0.0-beta.0 was published to npm. Run npm install @google-cloud/pubsub@next to install.