how about open a new repository for header only version？

[qcmc17]

Description

The disk space occupied by the repository so far has reached 176mb, a horrible size for a json library. I especially need a separate code repository with only header files when I use submodle to manage my code, thanks.

Reproduction steps

nope

Expected vs. actual results

nope

Minimal code example

nope

Error messages

nope

Compiler and operating system

centos

Library version

3.11.2

Validation

• [ ] The bug also occurs if the latest version from the develop branch is used.
• [X] I can successfully compile and run the unit tests.

[gregmarr]

Have you looked at this thread https://github.com/nlohmann/json/issues/2088#issuecomment-624490510 and specifically shallow submodules: https://stackoverflow.com/questions/2144406/how-to-make-shallow-git-submodules