fix: Use syntax compatible with older TypeScript versions

[eps1lon]

What:

Closes #1025

Why:

#1016 introduce syntax that's not compatible with older TypeScript versions.

How:

Don't label tuple members.

Checklist:

• [ ] Documentation added to the
  docs site
• Tests
• TypeScript definitions updated
• Ready to be merged
  

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[codecov]

Codecov Report

Merging #1026 (304e312) into main (74c63b7) will not change coverage.
The diff coverage is n/a.

@@            Coverage Diff            @@
##              main     #1026   +/-   ##
=========================================
  Coverage   100.00%   100.00%           
=========================================
  Files           25        25           
  Lines          916       916           
  Branches       286       286           
=========================================
  Hits           916       916           

Flag	Coverage Δ
node-12	100.00% <ø> (ø)
node-14	100.00% <ø> (ø)
node-16.9.1	100.00% <ø> (ø)

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[eps1lon]

Merging since the node 16 failure is due to nodejs/node#40030

[eps1lon]

Merging since the node 16 failure is due to nodejs/node#40030

Nevermind. Release is blocked by any failing node version so we'll have to wait for a new node release anyway.

[github-actions]

🎉 This PR is included in version 8.4.0 🎉

The release is available on:

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

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