Adds additional key to cubic bezier easing (#2108)

Author: vwallen

features/cubic-bezier-easing.yml

@@ -5,4 +5,5 @@ group:
   - animation
   - transitions
 compat_features:
+  - css.types.easing-function
   - css.types.easing-function.cubic-bezier

features/cubic-bezier-easing.yml.dist

@@ -14,4 +14,29 @@ status:
     safari: "6"
     safari_ios: "6"
 compat_features:
+  # baseline: high
+  # baseline_low_date: 2015-07-29
+  # baseline_high_date: 2018-01-29
+  # support:
+  #   chrome: "4"
+  #   chrome_android: "18"
+  #   edge: "12"
+  #   firefox: "4"
+  #   firefox_android: "4"
+  #   safari: "3.1"
+  #   safari_ios: "2"
+  - css.types.easing-function
+
+  # ⬇️ Same status as overall feature ⬇️
+  # baseline: high
+  # baseline_low_date: 2015-07-29
+  # baseline_high_date: 2018-01-29
+  # support:
+  #   chrome: "16"
+  #   chrome_android: "18"
+  #   edge: "12"
+  #   firefox: "4"
+  #   firefox_android: "4"
+  #   safari: "6"
+  #   safari_ios: "6"
   - css.types.easing-function.cubic-bezier