Add a key to functions feature (#2264)

Author: Elchi3

features/functions.yml

@@ -8,22 +8,23 @@ status:
   compute_from: javascript.functions
 compat_features:
   - javascript.builtins.Function
+  - javascript.builtins.Function.@@hasInstance
   - javascript.builtins.Function.Function
   - javascript.builtins.Function.apply
   - javascript.builtins.Function.apply.generic_arrays_as_arguments
   - javascript.builtins.Function.bind
   - javascript.builtins.Function.call
   - javascript.builtins.Function.length
-  - javascript.builtins.Function.toString
   - javascript.builtins.Function.length.configurable_true
   - javascript.builtins.Function.name
   - javascript.builtins.Function.name.configurable_true
   - javascript.builtins.Function.name.inferred_names
-  - javascript.builtins.Function.@@hasInstance
+  - javascript.builtins.Function.toString
+  - javascript.builtins.Function.toString.toString_revision
   - javascript.functions
   - javascript.functions.arguments
-  - javascript.functions.arguments.length
   - javascript.functions.arguments.@@iterator
+  - javascript.functions.arguments.length
   - javascript.functions.arrow_functions
   - javascript.functions.arrow_functions.trailing_comma
   - javascript.functions.block_level_functions

features/functions.yml.dist

@@ -326,3 +326,15 @@ compat_features:
   #   safari: "10"
   #   safari_ios: "10"
   - javascript.builtins.Function.name.inferred_names
+
+  # baseline: low
+  # baseline_low_date: 2023-09-18
+  # support:
+  #   chrome: "66"
+  #   chrome_android: "66"
+  #   edge: "79"
+  #   firefox: "54"
+  #   firefox_android: "54"
+  #   safari: "17"
+  #   safari_ios: "17"
+  - javascript.builtins.Function.toString.toString_revision