README.md: update gif and installation for lack of cask

[vitorgalvao]

No description provided.

[strafe]

Would you mind documenting how the GIF was made, just out curiosity. I had attempted to create a similar one but couldn't seem to get such a high fps/low file size.

[vitorgalvao]

Would you mind documenting how the GIF was made, just out curiosity.

Screenflow, really old version (5), on an (also really old) retina Macbook Pro. Exported at 100% size (which looks way larger when played back!) in the Lossless - ProRes with Alpha preset. Conversion to gif is via a personal script (brew install vitorgalvao/tiny-scripts/gfv, use gfv -h for help) which uses painstakingly researched techniques to achieve the best result. Then it’s included here at full size, but shrunk in the img tag.

[strafe]

Ah... that's a bit better, still not able to get under 1MB though. Maybe that's due to my source video? (vid.zip)