fix: added return types to functions returned by interpolate and context in core/cjs/context.ts

[gitschwifty]

Should fix issue #921 i18n._ now shows a string return type according to typescript tooltips in vscode

[vercel]

This pull request is being automatically deployed with Vercel (learn more).
To see the status of your deployment, click below or on the icon next to each commit.

🔍 Inspect: https://vercel.com/lingui-js/js-lingui/ftvv9zztx
✅ Preview: https://js-lingui-git-fork-gitschwifty-main.lingui-js.vercel.app

[codecov]

Codecov Report

Merging #922 (3cec131) into main (3afacec) will not change coverage.
The diff coverage is 100.00%.

@@           Coverage Diff           @@
##             main     #922   +/-   ##
=======================================
  Coverage   83.25%   83.25%           
=======================================
  Files          52       52           
  Lines        1571     1571           
  Branches      426      426           
=======================================
  Hits         1308     1308           
  Misses        156      156           
  Partials      107      107           

Impacted Files	Coverage Δ
packages/core/src/context.ts	86.00% <100.00%> (ø)

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update 3afacec...3cec131. Read the comment docs.

[semoal]

in v3, it's recommeded to just use t`` macro, you don't need i18n._ for practically anything 👍🏻 anyways returning string i think it's better than any

[semoal]

Released in 3.4.0 🥳