Support for TS based Lingui configuration

[danielkcz]

Fixes #940

In the end, I've included @endemolshinegroup/cosmiconfig-typescript-loader as a dependency to consume the Error class from it so it doesn't need to be copied too. In case the EndemolShineGroup/cosmiconfig-typescript-loader#132 gets merged & published, the code here can be simplified.

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[codecov]

Codecov Report

Merging #941 (45676c9) into main (249c486) will decrease coverage by 0.30%.
The diff coverage is 22.22%.

@@            Coverage Diff             @@
##             main     #941      +/-   ##
==========================================
- Coverage   83.25%   82.95%   -0.31%     
==========================================
  Files          52       52              
  Lines        1571     1578       +7     
  Branches      426      426              
==========================================
+ Hits         1308     1309       +1     
- Misses        156      162       +6     
  Partials      107      107              

Impacted Files	Coverage Δ
packages/conf/src/index.ts	80.51% <22.22%> (-6.63%)	⬇️

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[semoal]

Great Daniel, thanks for your contribution, i'm polishing some pending issues and we'll release a new version with this feature introduced :)

[semoal]

Released in 3.4.0 🥳