fix(types): update to the latest discovery types

[callmehiphop]

Some of the Model response objects have changed upstream, this is just us generating updated types for the request/response types.

• Tests and linter pass
• Code coverage does not decrease (if any source code was changed)
• Appropriate docs were updated (if necessary)

[codecov]

Codecov Report

Merging #518 into master will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master     #518   +/-   ##
=======================================
  Coverage   99.42%   99.42%           
=======================================
  Files           5        5           
  Lines         698      698           
  Branches      192      192           
=======================================
  Hits          694      694           
  Misses          3        3           
  Partials        1        1

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[callmehiphop]

@bcoe @JustinBeckwith is there anyway we could leverage Kokoro to generate the types for us?

/cc @shollyman

[shollyman]

Is types.d.ts fully autogenerated, or partially? It's not clear from this PR how that happens.

[callmehiphop]

@shollyman we have an npm script that generates that file when ran.