Merge pull request #31 from RedCMD/patch-1

Add `aspect-ratio`

Author: andreamah

grammars/css.cson

@@ -1498,7 +1498,7 @@
           (?:
             # Standard CSS
             accent-color|additive-symbols|align-content|align-items|align-self|all|animation|animation-delay|animation-direction|animation-duration
-            | animation-fill-mode|animation-iteration-count|animation-name|animation-play-state|animation-timing-function|backdrop-filter
+            | animation-fill-mode|animation-iteration-count|animation-name|animation-play-state|animation-timing-function|aspect-ratio|backdrop-filter
             | backface-visibility|background|background-attachment|background-blend-mode|background-clip|background-color|background-image
             | background-origin|background-position|background-position-[xy]|background-repeat|background-size|bleed|block-size|border
             | border-block-end|border-block-end-color|border-block-end-style|border-block-end-width|border-block-start|border-block-start-color