Cryptic dependency on `jpeg`

This package links against libjpeg during compilation but was not explicitly declared in the metadata until https://github.com/conda-forge/r-jpeg-feedstock/pull/12. We should patch the repository metadata to specify the jpeg version that it is compatible with.

Due to r-base switching from jpeg to libjpeg-turbo as the libjpeg provider, users are currently prone to DLL incompatibilities.

Example

## osx-64 builds, where r-base uses "libjpeg-turbo" and r-jpeg uses "jpeg"
$ mamba create -yn foo -c conda-forge r-base=4.2.3=h1f61658_1 r-jpeg=0.1_10=r42h815d134_0
# ...
$ conda run -n foo R -e 'library(jpeg)'

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Platform: x86_64-apple-darwin13.4.0 (64-bit)

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> library(jpeg)
Error: package or namespace load failed for ‘jpeg’ in dyn.load(file, DLLpath = DLLpath, ...):
 unable to load shared object '/Users/mfansler/miniconda3/envs/foo/lib/R/library/jpeg/libs/jpeg.dylib':
  dlopen(/Users/mfansler/miniconda3/envs/foo/lib/R/library/jpeg/libs/jpeg.dylib, 6): Library not loaded: @rpath/libjpeg.9.dylib
  Referenced from: /Users/mfansler/miniconda3/envs/foo/lib/R/library/jpeg/libs/jpeg.dylib
  Reason: image not found
Execution halted
ERROR conda.cli.main_run:execute(47): `conda run R -e library(jpeg)` failed. (See above for error)

conda-forge / r-jpeg-feedstock

Cryptic dependency on `jpeg` #13

Example