fix: AuthorizationV1.Options requires type definitions for iam_apikey and ibm_url

[nhayashida]

Though typing authorization/V1 were updated in #910, definitions for iam_apikey and ibm_url options are missing.
http://watson-developer-cloud.github.io/node-sdk/master/#authorization

Checklist

• npm test passes (tip: npm run autofix can correct most style issues)
• tests are included
• documentation is changed or added
• link to public docs when adding new a service or new features for an existing service

[CLAassistant]

All committers have signed the CLA.

[codecov-io]

Codecov Report

Merging #917 into master will decrease coverage by 27.61%.
The diff coverage is n/a.

@@             Coverage Diff             @@
##           master     #917       +/-   ##
===========================================
- Coverage   53.94%   26.33%   -27.62%     
===========================================
  Files          18       18               
  Lines        4462     4462               
  Branches      905      905               
===========================================
- Hits         2407     1175     -1232     
- Misses       2053     3286     +1233     
+ Partials        2        1        -1

Impacted Files	Coverage Δ
lib/common.ts	30% <0%> (-70%)	⬇️
assistant/v2.ts	20.33% <0%> (-62.72%)	⬇️
test/resources/service_error_util.js	20% <0%> (-60%)	⬇️
lib/synthesize-stream.ts	25.86% <0%> (-56.9%)	⬇️
assistant/v1.ts	19.29% <0%> (-56.78%)	⬇️
lib/recognize-stream.ts	14.63% <0%> (-50.01%)	⬇️
text-to-speech/v1-generated.ts	42.17% <0%> (-36.6%)	⬇️
language-translator/v3.ts	30.56% <0%> (-29.26%)	⬇️
tone-analyzer/v3.ts	61.17% <0%> (-28.24%)	⬇️
personality-insights/v3.ts	63.04% <0%> (-27.18%)	⬇️
... and 8 more

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[watson-github-bot]

🎉 This PR is included in version 4.2.5 🎉

The release is available on:

• npm package (@latest dist-tag)
• GitHub release

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