chore: release 2.0.0

[yoshi-automation]

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

2.0.0 (2019-05-17)

Bug Fixes

• deps: update dependency google-gax to ^0.26.0 (#606) (a637a68)
• Fix client pooling for long-lived listens (#614) (479bc9c), closes firebase/firebase-admin-node#499 #256
• deps: update dependency google-gax to v1 (#615) (687a353)
• run the generator (#616) (92b0add)
• docs: revert jsdoc and pin to 3.5.5 (#627) (e22f9c6)
• Support more than 100 long-lived streams (#623) (9474e3f)

Build System

• upgrade engines field to >=8.10.0 (#608) (32485f4)
• upgrade engines field to >=8.13.0 (#636) (a5db7d8)

Code Refactoring

• deprecation: remove deprecated getCollections() (#624) (43ac9c6)
• deprecation: remove legacy support for array arguments (#625) (54dd405)

BREAKING CHANGES

• library now requires Node >= 8.13.0
• deprecation: remove legacy support for array arguments (refactor(deprecation)!: remove legacy support for array arguments #625)
• deprecation: remove deprecated getCollections() (refactor(deprecation)!: remove deprecated getCollections() #624)
• upgrade engines field to >=8.10.0 (build!: upgrade engines field to >=8.10.0 #608)

[codecov]

Codecov Report

Merging #640 into master will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master     #640   +/-   ##
=======================================
  Coverage   61.49%   61.49%           
=======================================
  Files          21       21           
  Lines        3420     3420           
  Branches      459      459           
=======================================
  Hits         2103     2103           
  Misses       1254     1254           
  Partials       63       63

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[codecov]

Codecov Report

Merging #640 into master will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master     #640   +/-   ##
=======================================
  Coverage   61.49%   61.49%           
=======================================
  Files          21       21           
  Lines        3420     3420           
  Branches      459      459           
=======================================
  Hits         2103     2103           
  Misses       1254     1254           
  Partials       63       63

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update b2e6d02...24b858b. Read the comment docs.