fix: cloud service import() on case-sensitive filesystems

[MichaelHoste]

We found an issue on case sensitive systems where the cloud service (if one was present) was not loading correctly.

We made sure to lowercase the first letter so that it works on both case-sensitive and case-insensitive systems.

[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/8D3qqJnJUNLo88iAFmmn7z1KdLrp
✅ Preview: Failed

[codecov]

Codecov Report

Merging #1174 (19a64a1) into main (1c8e657) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##             main    #1174   +/-   ##
=======================================
  Coverage   81.71%   81.71%           
=======================================
  Files          56       56           
  Lines        1766     1766           
  Branches      490      490           
=======================================
  Hits         1443     1443           
  Misses        192      192           
  Partials      131      131           

---

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 987b5c4...19a64a1. Read the comment docs.

[semoal]

Hi 👋 Michaël! LGTM, will release a new version today

[MichaelHoste]

Thanks a lot for your quick response @semoal ! 🥳