From 9eed675e519aa88ecb87fecc8e1f42e4c55ef395 Mon Sep 17 00:00:00 2001
From: Ivan Akulov <gxoptg@gmail.com>
Date: Sat, 24 Mar 2018 18:34:44 +0300
Subject: [PATCH] Fix the unknown locale warning with Moment 2.21.0

---
 index.js          | 8 +++++++-
 package-lock.json | 3 +--
 package.json      | 2 +-
 3 files changed, 9 insertions(+), 4 deletions(-)

diff --git a/index.js b/index.js
index 2ed93de..9b96e25 100644
--- a/index.js
+++ b/index.js
@@ -50,7 +50,13 @@ function normalizeLocalesToKeep(localesToKeep) {
 
     // Check if has unknown locales
     var absentLocales = localesToKeep.filter(function(localeName) {
-        return moment.localeData(localeName) === null;
+        const localeData = moment.localeData(localeName);
+        return (
+            // For Moment 2.20.1−
+            localeData === null ||
+            // For Moment. 2.21.0+ – this version now returns a default locale instead of null
+            localeData === moment.localeData()
+        );
     });
     if (absentLocales.length > 0) {
         throw new Error(
diff --git a/package-lock.json b/package-lock.json
index 82acad0..4785c27 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1470,8 +1470,7 @@
                         "jsbn": {
                             "version": "0.1.1",
                             "bundled": true,
-                            "dev": true,
-                            "optional": true
+                            "dev": true
                         },
                         "json-schema": {
                             "version": "0.2.3",
diff --git a/package.json b/package.json
index d5e4692..0718d4b 100644
--- a/package.json
+++ b/package.json
@@ -16,7 +16,7 @@
     },
     "devDependencies": {
         "jest": "^22.1.1",
-        "moment": "^2.20.1",
+        "moment": "^2.21.0",
         "proxyquire": "^2.0.1",
         "temp-dir": "^1.0.0",
         "webpack": "^4.2.0"