Warnings are hard to separate from desired output

[mdellweg]

• bump-my-version version: 0.28.1
• Python version: 3.12.7
• Operating System: Linux

Description

Running bump-my-version show new_version --increment release is supposed to output the new version in a parsable form. But in the face of a warning, the output is hard to dissect by a script. If the warning could be suppressed or routed to stderr, this would be easy to accomplish. The specific command I am interested in is:
NEW_VERSION="$(bump-my-version show new_version --increment release)"

What I Did

$ NEW_VERSION="$(bump-my-version show new_version --increment release)"
$ echo "$NEW_VERSION"

WARNING:

The .cfg file format is deprecated. Please use .toml instead.

3.68.0

My suggestion would be to add err=True to the call to click.secho in print_warning.