Transform ES2015 Unicode Escapes to ES5 (#11377)

packages/babel-compat-data/data/plugins.json

@@ -98,6 +98,7 @@
     "chrome": "62",
     "opera": "49",
     "edge": "79",
+    "firefox": "78",
     "safari": "11.1",
     "node": "8.10",
     "ios": "11.3",
@@ -108,6 +109,7 @@
     "chrome": "64",
     "opera": "51",
     "edge": "79",
+    "firefox": "78",
     "safari": "11.1",
     "node": "10",
     "ios": "11.3",
@@ -279,6 +281,17 @@
     "samsung": "5",
     "electron": "0.37"
   },
+  "transform-unicode-escapes": {
+    "chrome": "44",
+    "opera": "31",
+    "edge": "12",
+    "firefox": "53",
+    "safari": "9",
+    "node": "4",
+    "ios": "9",
+    "samsung": "4",
+    "electron": "0.30"
+  },
   "transform-unicode-regex": {
     "chrome": "50",
     "opera": "37",