feat(types): enabled string association

[IgorSzymanski]

Pull Request check-list

Please make sure to review and check all of these items:

• Does npm run test or npm run test-DIALECT pass with this change (including linting)?
• Does the description below contain a link to an existing issue (Closes #[issue]) or a description of the issue you are solving?
• Have you added new tests to prevent regressions?
• Is a documentation update included (if this change modifies existing APIs, or introduces new ones)?
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Description of change

[SimonSchick]

Change is sane but please add a simple test :)

[codecov]

Codecov Report

Merging #10481 into master will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master   #10481   +/-   ##
=======================================
  Coverage   96.18%   96.18%           
=======================================
  Files          92       92           
  Lines        9494     9494           
=======================================
  Hits         9132     9132           
  Misses        362      362

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[IgorSzymanski]

@SimonSchick I added some test, but I'm not sure if it's any good as I'm not that experienced in writing tests.

[SimonSchick]

@IgorSzymanski @sushantdhiman I should've been more specific.
There was already a test, I was talking about a test for the typings.