Update values-4.vim

https://www.w3.org/TR/2020/WD-css-values-4-20201111/

Author: hail2u

after/syntax/css/values-4.vim

@@ -1,2 +1,2 @@
 syn match cssValueLength contained "[-+]\=\d\+\(\.\d*\)\=\(vi\|vb\|ic\|cap\|lh\|rlh\)"
-syn region cssFunction contained matchgroup=cssFunctionName start="\<\(min\|max\|clamp\|toggle\)\s*(" end=")" oneline keepend
+syn region cssFunction contained matchgroup=cssFunctionName start="\<\(min\|max\|clamp\|toggle\|round\|mod\|rem\|a\=\(sin\|cos\|tan\)\|atan2\|pow\|sqrt\|hypot\|log\|exp\|abs\|sign\)\s*(" end=")" oneline keepend

test/test.css

@@ -1161,6 +1161,23 @@ view {
 	display: max(0, 1);
 	display: clamp(0, 100, 2);
 	display: toggle(italic, normal);
+	display: round(var(--width), 50px);
+	display: mod(-18px, 5px);
+	display: rem(-18px, 5px);
+	display: sin(45deg);
+	display: cos(1);
+	display: tan(1);
+	display: asin(45deg);
+	display: acos(1);
+	display: atan(1);
+	display: atan2(1, -1);
+	display: pow(1.5, -1);
+	display: sqrt(4);
+	display: hypot(30px, 40px);
+	display: log(10);
+	display: exp(1);
+	display: abs(-1);
+	display: sign(-4);
 }
 
 .variables-1 {