[jsoncons] Update to version 0.168.7

[danielaparker]

Describe the pull request

• What does your PR fix?

  Fixes warning C4002 on windows with msvs2022 danielaparker/jsoncons#352,Array move constructor of basic_json copies provided array. danielaparker/jsoncons#355,Iterating an object and erasing members danielaparker/jsoncons#363,[csv] Exponential formatted numbers with leading zeros in exponent danielaparker/jsoncons#365,Issue with assignment of an object_iterator to const_object_iterator using empty object danielaparker/jsoncons#372

• Which triplets are supported/not supported? Have you updated the CI baseline?

  All

• Does your PR follow the maintainer guide?

  Yes

• If you have added/updated a port: Have you run ./vcpkg x-add-version --all and committed the result?

  Yes

If you are still working on the PR, open it as a Draft: https://github.blog/2019-02-14-introducing-draft-pull-requests/

[github-actions]

This is a new experimental fast check for PR issues. Please let us know if this bot is helpful!

PRs must add only one version and must not modify any published versions

When making any changes to a library, the version or port-version in vcpkg.json or CONTROL must be modified.

error: checked-in files for jsoncons have changed but the version was not updated
version: 0.168.7#1
old SHA: 66f8c4ffff882a7024a028b1c5276978d6bff741
new SHA: a06c82e66653619b0e8402ff1165bf8f6788784b
Did you remember to update the version or port version?
Use --overwrite-version to bypass this check
***No files were updated***

You have modified or added at least one portfile where deprecated functions are used.

If you feel able to do so, please consider migrating them to the new functions:
vcpkg_install_cmake -> vcpkg_cmake_install (from port vcpkg-cmake)
vcpkg_build_cmake -> vcpkg_cmake_build (from port vcpkg-cmake)
vcpkg_configure_cmake -> vcpkg_cmake_configure (Please remove the option PREFER_NINJA) (from port vcpkg-cmake)
vcpkg_fixup_cmake_targets -> vcpkg_cmake_config_fixup (from port vcpkg-cmake-config)

In the ports that use the new function, you have to add the corresponding dependencies:

{
  "name": "vcpkg-cmake",
  "host": true
},
{
  "name": "vcpkg-cmake-config",
  "host": true
}

The following files are affected:

• ports/jsoncons/portfile.cmake

You have modified or added at least one vcpkg.json where you should check the license field.

If you feel able to do so, please consider adding a "license" field to the following files:

• ports/jsoncons/vcpkg.json

Valid values for the license field can be found in the documentation