Bump webpack from 4.16.3 to 4.16.4 in /js

Bumps [webpack](https://github.com/webpack/webpack) from 4.16.3 to 4.16.4.
- [Release notes](https://github.com/webpack/webpack/releases)
- [Commits](https://github.com/webpack/webpack/compare/v4.16.3...v4.16.4)

Signed-off-by: dependabot[bot] <support@dependabot.com>

js/package-lock.json

@@ -391,6 +391,7 @@
       "resolved": "https://registry.npmjs.org/agent-base/-/agent-base-4.2.1.tgz",
       "integrity": "sha512-JVwXMr9nHYTUXsBFKUqhJwvlcYU/blreOEUkhNR2eXZIvwd+c+o5V4MgDPKWnMS/56awN3TRzIP+KoPn+roQtg==",
       "dev": true,
+      "optional": true,
       "requires": {
         "es6-promisify": "^5.0.0"
       }
@@ -1761,9 +1762,9 @@
       }
     },
     "buffer-from": {
-      "version": "1.1.0",
-      "resolved": "https://registry.npmjs.org/buffer-from/-/buffer-from-1.1.0.tgz",
-      "integrity": "sha512-c5mRlguI/Pe2dSZmpER62rSCu0ryKmWddzRYsuXc50U2/g8jMOulc31VZMa4mYx31U5xsmSOpDCgH88Vl9cDGQ==",
+      "version": "1.1.1",
+      "resolved": "https://registry.npmjs.org/buffer-from/-/buffer-from-1.1.1.tgz",
+      "integrity": "sha512-MQcXEUbCKtEo7bhqEs6560Hyd4XaovZlO/k9V3hjVUF/zwW7KBVdSK4gIt/bzwS9MbR5qob+F5jusZsb0YQK2A==",
       "dev": true
     },
     "buffer-more-ints": {
@@ -2783,13 +2784,15 @@
       "version": "4.2.4",
       "resolved": "https://registry.npmjs.org/es6-promise/-/es6-promise-4.2.4.tgz",
       "integrity": "sha512-/NdNZVJg+uZgtm9eS3O6lrOLYmQag2DjdEXuPaHlZ6RuVqgqaVZfgYCepEIKsLqwdQArOPtC3XzRLqGGfT8KQQ==",
-      "dev": true
+      "dev": true,
+      "optional": true
     },
     "es6-promisify": {
       "version": "5.0.0",
       "resolved": "https://registry.npmjs.org/es6-promisify/-/es6-promisify-5.0.0.tgz",
       "integrity": "sha1-UQnWLz5W6pZ8S2NQWu8IKRyKUgM=",
       "dev": true,
+      "optional": true,
       "requires": {
         "es6-promise": "^4.0.3"
       }
@@ -5004,7 +5007,8 @@
       "version": "0.1.0",
       "resolved": "https://registry.npmjs.org/libbase64/-/libbase64-0.1.0.tgz",
       "integrity": "sha1-YjUag5VjrF/1vSbxL2Dpgwu3UeY=",
-      "dev": true
+      "dev": true,
+      "optional": true
     },
     "libmime": {
       "version": "3.0.0",
@@ -5031,7 +5035,8 @@
       "version": "1.1.0",
       "resolved": "https://registry.npmjs.org/libqp/-/libqp-1.1.0.tgz",
       "integrity": "sha1-9ebgatdLeU+1tbZpiL9yjvHe2+g=",
-      "dev": true
+      "dev": true,
+      "optional": true
     },
     "linkify-it": {
       "version": "2.0.3",
@@ -5993,13 +5998,15 @@
       "version": "1.6.0",
       "resolved": "https://registry.npmjs.org/nodemailer-fetch/-/nodemailer-fetch-1.6.0.tgz",
       "integrity": "sha1-ecSQihwPXzdbc/6IjamCj23JY6Q=",
-      "dev": true
+      "dev": true,
+      "optional": true
     },
     "nodemailer-shared": {
       "version": "1.1.0",
       "resolved": "https://registry.npmjs.org/nodemailer-shared/-/nodemailer-shared-1.1.0.tgz",
       "integrity": "sha1-z1mU4v0mjQD1zw+nZ6CBae2wfsA=",
       "dev": true,
+      "optional": true,
       "requires": {
         "nodemailer-fetch": "1.6.0"
       }
@@ -6654,7 +6661,8 @@
       "version": "1.1.2",
       "resolved": "https://registry.npmjs.org/prelude-ls/-/prelude-ls-1.1.2.tgz",
       "integrity": "sha1-IZMqVJ9eUv/ZqCf1cOBL5iqX2lQ=",
-      "dev": true
+      "dev": true,
+      "optional": true
     },
     "private": {
       "version": "0.1.8",
@@ -7769,9 +7777,9 @@
       }
     },
     "stream-each": {
-      "version": "1.2.2",
-      "resolved": "https://registry.npmjs.org/stream-each/-/stream-each-1.2.2.tgz",
-      "integrity": "sha512-mc1dbFhGBxvTM3bIWmAAINbqiuAk9TATcfIQC8P+/+HJefgaiTlMn2dHvkX8qlI12KeYKSQ1Ua9RrIqrn1VPoA==",
+      "version": "1.2.3",
+      "resolved": "https://registry.npmjs.org/stream-each/-/stream-each-1.2.3.tgz",
+      "integrity": "sha512-vlMC2f8I2u/bZGqkdfLQW/13Zihpej/7PmSiMQsbYddxuTsJp8vRe2x2FvVExZg7FaOds43ROAuFJwPR4MTZLw==",
       "dev": true,
       "requires": {
         "end-of-stream": "^1.1.0",
@@ -8473,9 +8481,9 @@
       }
     },
     "webpack": {
-      "version": "4.16.3",
-      "resolved": "https://registry.npmjs.org/webpack/-/webpack-4.16.3.tgz",
-      "integrity": "sha512-3VcrVoFgzSz1IYgga71YpU3HO89Al5bSnDOj9RJQPsy+FNyI1sFsUyJITn3pktNuaRBlQT0usvKZE3GgkPGAIw==",
+      "version": "4.16.4",
+      "resolved": "https://registry.npmjs.org/webpack/-/webpack-4.16.4.tgz",
+      "integrity": "sha512-RqUfwp4qMqv3oFwBQQOoK69C2tdu2FHJEqPABPqgjGDvOIOLqkTOhmmdJjpiRabzNAAH1ahmkA3z4xowlHN+VA==",
       "dev": true,
       "requires": {
         "@webassemblyjs/ast": "1.5.13",

js/package.json

@@ -28,7 +28,7 @@
     "karma": "^2.0.5",
     "mini-css-extract-plugin": "^0.4.1",
     "node-sass": "^4.9.2",
-    "webpack": "^4.16.3",
+    "webpack": "^4.16.4",
     "webpack-cli": "^3.1.0",
     "webpack-merge": "^4.1.3"
   },