Gendesk 1.0.10

• Add a category check and warning, ref #21 (thanks for creating an issue @jose1711).
• Add support for .svg icons in PKGBUILD files, ref #22 (thanks for creating an issue @fanninpm).
• Rename default.png to gendesk.png, ref #26 (thanks for creating an issue @el-totsira).
• Use io instead of the deprecated ioutil package.
• Switch from the MIT to the BSD-3 license.
• Update CI configuration.
• Update documentation.
• Update dependencies.
• Some refactoring.