SDK Release 6

[dpopp07]

Release 6:

• Regenerated all services
• Cherry picked hand-written edits
• Added unit and integration tests for new methods
• Adjusted the size parameter in Discovery
• Updated the "Getting Credentials" section in the README

[codecov-io]

Codecov Report

Merging #766 into master will increase coverage by 0.02%.
The diff coverage is 84.72%.

@@            Coverage Diff             @@
##           master     #766      +/-   ##
==========================================
+ Coverage    83.2%   83.22%   +0.02%     
==========================================
  Files          35       35              
  Lines        4418     4490      +72     
  Branches      557      564       +7     
==========================================
+ Hits         3676     3737      +61     
- Misses        361      362       +1     
- Partials      381      391      +10

Impacted Files	Coverage Δ
speech-to-text/v1-generated.ts	84.51% <ø> (ø)	⬆️
visual-recognition/v3-generated.ts	80.7% <ø> (ø)	⬆️
natural-language-classifier/v1-generated.ts	89.55% <ø> (ø)	⬆️
discovery/v1-generated.ts	72.66% <84.72%> (+1.54%)	⬆️

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[mediumTaj]

👍 looks good!

[watson-github-bot]

🎉 This PR is included in version 3.9.0 🎉

The release is available on:

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

Your semantic-release bot 📦🚀