chore: release 2.0.0

[release-please[bot]]

:robot: I have created a release *beep* *boop*

2.0.0 (2020-05-12)

⚠ BREAKING CHANGES

• synth.py clean up for multiple version (#160)
• The library now supports Node.js v10+. The last version to support Node.js v8 is tagged legacy-8 on NPM.

Features

• drop node8 support (#139) (f6fa067)

Bug Fixes

• export explicit version from protos.js (#144) (c6d1391)
• regen protos and tests, formatting (#157) (d53c859)
• remove eslint, update gax, fix generated protos, run the generator (#148) (f23b8fd)
• remove unused files (#151) (72134c3)

• synth.py clean up for multiple version (#160) (c1d0bb7)

This PR was generated with Release Please.

[codecov[bot]]

Codecov Report

Merging #140 into master will increase coverage by 0.00%. The diff coverage is n/a.

@@           Coverage Diff           @@
##           master     #140   +/-   ##
=======================================
  Coverage   61.05%   61.05%           
=======================================
  Files           2        2           
  Lines       18840    18841    +1     
  Branches        1        1           
=======================================
+ Hits        11502    11503    +1     
  Misses       7338     7338           

Impacted Files	Coverage Δ
src/index.ts	100.00% <0.00%> (ø)

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[yoshi-automation]

Release is at https://github.com/googleapis/nodejs-web-risk/releases/tag/v2.0.0