add option to install with home brew

[ibenrodriguez]

It would be great to be able to install macSVG using the home brew system. This way updates can also be easily made.

BTW - the text here should be corrected: https://github.com/dsward2/macSVG/releases/tag/v1.1.7

It currently says "Download "macSVG-v1.1.7.zip" from the "Assets" section above" but the Assets section is below. I must have spent 10 minutes looking for it in different places thinking I had read it wrong or needed to be logged in or something. And then I thought to myself - this would all be so much easier with homebrew. But alas - it's not on there.

Also - Here is some info on this request for home brew. I appreciate your work to make this such as great tool!!!

• https://docs.brew.sh/Adding-Software-to-Homebrew

There are many other SVG tools available there but not quite like this one.

1. imagemagick: add rsvg support Homebrew/homebrew-core#36773
2. varnish 6.2.0 Homebrew/homebrew-core#39166
3. asciidoctor 2.0.12 Homebrew/homebrew-core#64487
4. graphviz, compile with rsvg Homebrew/homebrew-core#65310
5. mermaid-cli 8.8.4 (new formula) Homebrew/homebrew-core#67804