Update dependency webpack to v4.22.0 (https://github.com/woocommerce/woocommerce-admin/pull/617)

plugins/woocommerce-admin/package-lock.json

@@ -5811,7 +5811,8 @@
           "version": "2.1.1",
           "resolved": "https://registry.npmjs.org/ansi-regex/-/ansi-regex-2.1.1.tgz",
           "integrity": "sha1-w7M6te42DYbg5ijwRorn7yfWVN8=",
-          "dev": true
+          "dev": true,
+          "optional": true
         },
         "aproba": {
           "version": "1.2.0",
@@ -6276,7 +6277,8 @@
           "version": "5.1.1",
           "resolved": "https://registry.npmjs.org/safe-buffer/-/safe-buffer-5.1.1.tgz",
           "integrity": "sha512-kKvNJn6Mm93gAczWVJg7wH+wGYWNrDHdWvpUmHyEsgCtIwwo3bqPtV4tR5tuPaUhTOo/kvhVwd8XwwOllGYkbg==",
-          "dev": true
+          "dev": true,
+          "optional": true
         },
         "safer-buffer": {
           "version": "2.1.2",
@@ -6340,6 +6342,7 @@
           "resolved": "https://registry.npmjs.org/strip-ansi/-/strip-ansi-3.0.1.tgz",
           "integrity": "sha1-ajhfuIU9lS1f8F0Oiq+UJ43GPc8=",
           "dev": true,
+          "optional": true,
           "requires": {
             "ansi-regex": "^2.0.0"
           }
@@ -6388,13 +6391,15 @@
           "version": "1.0.2",
           "resolved": "https://registry.npmjs.org/wrappy/-/wrappy-1.0.2.tgz",
           "integrity": "sha1-tSQ9jz7BqjXxNkYFvA0QNuMKtp8=",
-          "dev": true
+          "dev": true,
+          "optional": true
         },
         "yallist": {
           "version": "3.0.2",
           "resolved": "https://registry.npmjs.org/yallist/-/yallist-3.0.2.tgz",
           "integrity": "sha1-hFK0u36Dx8GI2AQcGoN8dz1ti7k=",
-          "dev": true
+          "dev": true,
+          "optional": true
         }
       }
     },
@@ -15703,9 +15708,9 @@
       "dev": true
     },
     "webpack": {
-      "version": "4.21.0",
-      "resolved": "https://registry.npmjs.org/webpack/-/webpack-4.21.0.tgz",
-      "integrity": "sha512-CGBeop4AYR0dcmk9Afl33qQULwTHQCXQPAIBTHMJoy9DpY8FPUDna/NUlAGTr5o5y9QC901Ww3wCY4wNo1X9Lw==",
+      "version": "4.22.0",
+      "resolved": "https://registry.npmjs.org/webpack/-/webpack-4.22.0.tgz",
+      "integrity": "sha512-2+3EYFqyhPl12buLQ42QPHEEh8BHn3P9ipRvGRHhdfKJ1u9svhZ3QjhIoEdL5SeIhL5gfOZVbBnartYEabkEsg==",
       "dev": true,
       "requires": {
         "@webassemblyjs/ast": "1.7.8",

plugins/woocommerce-admin/package.json

@@ -102,7 +102,7 @@
     "recast": "0.16.0",
     "sass-loader": "7.1.0",
     "style-loader": "0.23.1",
-    "webpack": "4.21.0",
+    "webpack": "4.22.0",
     "webpack-cli": "3.1.2"
   },
   "dependencies": {