Add css scroll-snap-type

Author: abaracedo

src/extensions/default/CSSCodeHints/CSSProperties.json

@@ -190,6 +190,7 @@
     "resize":                      {"values": ["both", "horizontal", "none", "vertical", "inherit"]},
     "right":                       {"values": ["auto", "inherit"]},
     "scroll-behavior":             {"values": ["auto", "smooth"]},
+    "scroll-snap-type":            {"values": ["none", "x", "y", "block", "inline", "both", "mandatory", "proximity"]},
     "src":                         {"values": [ "url()"]},
     "shape-image-threshold":       {"values": []},
     "shape-inside":                {"values": ["auto", "circle()", "ellipse()", "inherit", "outside-shape", "polygon()", "rectangle()"]},