Allow nullsafety for package:intl

Change-Id: Iad9a67de93f1850105442441b47001e53748fd22
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/164802
Auto-Submit: Nate Bosch <nbosch@google.com>
Reviewed-by: Kevin Moore <kevmoo@google.com>
diff --git a/pkg/front_end/lib/src/api_prototype/experimental_flags_generated.dart b/pkg/front_end/lib/src/api_prototype/experimental_flags_generated.dart
index ba34ca2..955df67 100644
--- a/pkg/front_end/lib/src/api_prototype/experimental_flags_generated.dart
+++ b/pkg/front_end/lib/src/api_prototype/experimental_flags_generated.dart
@@ -175,6 +175,9 @@
   "flutter_goldens_client": {
     ExperimentalFlag.nonNullable,
   },
+  "intl": {
+    ExperimentalFlag.nonNullable,
+  },
   "js": {
     ExperimentalFlag.nonNullable,
   },
diff --git a/sdk/lib/_internal/allowed_experiments.json b/sdk/lib/_internal/allowed_experiments.json
index 464837e..34f341e 100644
--- a/sdk/lib/_internal/allowed_experiments.json
+++ b/sdk/lib/_internal/allowed_experiments.json
@@ -67,6 +67,9 @@
     "flutter_goldens_client": {
       "experimentSet": "nullSafety"
     },
+    "intl": {
+      "experimentSet": "nullSafety"
+    },
     "js": {
       "experimentSet": "nullSafety"
     },