Add COLRv1 color font format (web-platform-dx#603)

Author: foolip

feature-group-definitions/colrv1.yml

@@ -0,0 +1,5 @@
+name: COLRv1
+spec: https://learn.microsoft.com/en-us/typography/opentype/otspec191alpha/colr
+caniuse: colr-v1
+compat_features:
+  - css.at-rules.font-face.OpenType_COLRv1

scripts/specs.ts

@@ -17,6 +17,10 @@ const defaultAllowlist: allowlistItem[] = [
     //     "https://example.com/spec/",
     //     "Allowed because…. Remove this exception when https://example.com/org/repo/pull/1234 merges."
     // ]
+    [
+        "https://learn.microsoft.com/en-us/typography/opentype/otspec191alpha/colr",
+        "Allowed because COLRv1 is shipping in Chrome and Firefox. Remove this exception when https://github.com/w3c/browser-specs/pull/1211 is released."
+    ]
 ];
 
 function isOK(url: URL, allowlist: allowlistItem[] = defaultAllowlist) {