Add a key to Map

features/map.yml

@@ -19,3 +19,21 @@ snapshot: ecmascript-2015
 group: maps
 status:
   compute_from: javascript.builtins.Map.Map
+compat_features:
+  - javascript.builtins.Map
+  - javascript.builtins.Map.@@iterator
+  - javascript.builtins.Map.@@species
+  - javascript.builtins.Map.Map
+  - javascript.builtins.Map.Map.iterable_allowed
+  - javascript.builtins.Map.Map.null_allowed
+  - javascript.builtins.Map.clear
+  - javascript.builtins.Map.delete
+  - javascript.builtins.Map.entries
+  - javascript.builtins.Map.forEach
+  - javascript.builtins.Map.get
+  - javascript.builtins.Map.has
+  - javascript.builtins.Map.key_equality_for_zeros
+  - javascript.builtins.Map.keys
+  - javascript.builtins.Map.set
+  - javascript.builtins.Map.size
+  - javascript.builtins.Map.values

features/map.yml.dist

@@ -126,3 +126,16 @@ compat_features:
   #   safari: "10"
   #   safari_ios: "10"
   - javascript.builtins.Map.@@iterator
+
+  # baseline: high
+  # baseline_low_date: 2016-09-20
+  # baseline_high_date: 2019-03-20
+  # support:
+  #   chrome: "51"
+  #   chrome_android: "51"
+  #   edge: "13"
+  #   firefox: "41"
+  #   firefox_android: "41"
+  #   safari: "10"
+  #   safari_ios: "10"
+  - javascript.builtins.Map.@@species