bump-deps: bump requires attributes too

[ericLemanissier]

tested on https://github.dev/conan-io/conan-center-index/edit/master/recipes/samarium/all/conanfile.py:

updating fmt/9.0.0 to fmt/10.2.1 in ./conanfile.py:20
updating sfml/2.5.1 to sfml/2.6.1 in ./conanfile.py:20
updating stb/cci.20210910 to stb/cci.20230920 in ./conanfile.py:20
Successfully bumped the dependencies of recipe ./conanfile.py

[ericLemanissier]

The extension is currently searching for bumps in CCI recipes https://github.com/ericLemanissier/conan-center-index-bump-deps/actions/runs/7488228224/job/20382244977 new bumps identified as of now:

• https://github.com/ericLemanissier/conan-center-index/commit/c6dbda526cf90b38dc7a470724ab7784ef43a66a
• https://github.com/ericLemanissier/conan-center-index/commit/1b7de77cd0a207c5c33e5327a2b6d449dbb2ce3f
• https://github.com/ericLemanissier/conan-center-index/commit/42a18190e62919c4878984763b45d9b20ba9f195

[ericLemanissier]

@czoido this is ready to be reviewed and merged