fix(deps): update dependency @google-cloud/common to ^0.28.0

[renovate]

This PR contains the following updates:

Package	Type	Update	Change	References
@​google-cloud/common	dependencies	minor	^0.27.0 -> ^0.28.0	source

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Release Notes

googleapis/nodejs-common

v0.28.0

Compare Source

12-13-2018 14:34 PST

This release has breaking changes. The signature of the protected request method on ServiceObject has been changed. The method now resolves with an array of [Body, Response], making it consistent with all other promisified methods. This change was made to fix several breaking changes that occurred in the 0.18.0 release.

New Features

• feat: allow passing GoogleAuth client to Service (#​314)
• feat: add maybeOptionsOrCallback util method (#​315)

Bug Fixes

• fix: revert async behavior of request (#​331)

Documentation

• docs: update readme badges (#​316)

Internal / Testing Changes

• chore(deps): update dependency @​types/sinon to v7 (#​332)
• chore(build): inject yoshi automation key (#​330)
• chore: update nyc and eslint configs (#​329)
• chore: fix publish.sh permission +x (#​327)
• fix(build): fix Kokoro release script (#​326)
• build: add Kokoro configs for autorelease (#​325)
• chore: always nyc report before calling codecov (#​322)
• chore: nyc ignore build/test by default (#​321)
• chore(build): update the prettier config (#​319)
• chore: update license file (#​318)
• fix(build): fix system key decryption (#​313)
• chore(deps): update dependency @​types/sinon to v5.0.7 (#​308)
• chore(deps): update dependency typescript to ~3.2.0 (#​312)

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