chore: release 3.0.0

[yoshi-automation]

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

3.0.0 (2019-05-17)

Bug Fixes

• validate action of getSignedUrl() function (#684) (1b09d24)
• deps: update dependency @google-cloud/common to v1 (#705) (72a9f51)
• deps: update dependency @google-cloud/paginator to v1 (#695) (ada995e)
• deps: update dependency @google-cloud/promisify to v1 (#693) (5df2f83)
• deps: update dependency @google-cloud/pubsub to ^0.29.0 (#714) (3ee1a2c)
• deps: update dependency arrify to v2 (#667) (ce02c27)
• deps: update dependency xdg-basedir to v4 (#681) (8b40e6a)
• ts: improve return types for response metadata (#666) (da42bed)
• types: fix signatures of listing methods (#703) (42937a8)

Build System

• upgrade engines field to >=8.10.0 (#688) (6a1fa0f)

BREAKING CHANGES

• upgrade engines field to >=8.10.0 (build!: upgrade engines field to >=8.10.0 #688)

[codecov]

Codecov Report

Merging #716 into master will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master     #716   +/-   ##
=======================================
  Coverage   96.77%   96.77%           
=======================================
  Files           9        9           
  Lines        1149     1149           
  Branches      294      294           
=======================================
  Hits         1112     1112           
  Misses          9        9           
  Partials       28       28

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