v1.0.4

• Addressed Doxygen warnings about resolvable links to Error, Info, and Debug globals.
• Addressed an issue in which unit tests could not be linked when the CppUnit package is / was not configured with pkg-config.
• Handle GitHub Workflow Actions continuous integration (CI) on macOS with Apple Silicon (that is, arm64).
• Updated nlbuild-autotools to 1.7.8.
• Updated Doxygen configuration for Doxygen 1.11.0.