You can bind Snip & Sketch to the Print Screen button in Ease of Access -> Keyboard. This is a new feature in Windows 10 1809.
On a related note I hope they aren't done developing "Snip & Sketch" it still lacks features from the Snipping tool in 1809 (Delay Granularity, Window Snip, Highlighter, and the new Ruler is buggy as heck).