Bump webpack-merge from 4.1.2 to 4.1.3 in /js

Bumps [webpack-merge](https://github.com/survivejs/webpack-merge) from 4.1.2 to 4.1.3.
- [Release notes](https://github.com/survivejs/webpack-merge/releases)
- [Changelog](https://github.com/survivejs/webpack-merge/blob/master/CHANGELOG.md)
- [Commits](https://github.com/survivejs/webpack-merge/compare/v4.1.2...v4.1.3)

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

js/package-lock.json

@@ -317,6 +317,7 @@
       "resolved": "https://registry.npmjs.org/agent-base/-/agent-base-4.2.0.tgz",
       "integrity": "sha512-c+R/U5X+2zz2+UCrCFv6odQzJdoqI+YecuhnAJLa1zYaMc13zPfwMwZrr91Pd1DYNo/yPRbiM4WVf9whgwFsIg==",
       "dev": true,
+      "optional": true,
       "requires": {
         "es6-promisify": "^5.0.0"
       }
@@ -2320,13 +2321,15 @@
       "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"
       }
@@ -4654,7 +4657,8 @@
       "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",
@@ -4681,7 +4685,8 @@
       "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",
@@ -5498,13 +5503,15 @@
       "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"
       }
@@ -6617,7 +6624,8 @@
       "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
     },
     "prepend-http": {
       "version": "1.0.4",
@@ -9341,9 +9349,9 @@
       }
     },
     "webpack-merge": {
-      "version": "4.1.2",
-      "resolved": "https://registry.npmjs.org/webpack-merge/-/webpack-merge-4.1.2.tgz",
-      "integrity": "sha512-/0QYwW/H1N/CdXYA2PNPVbsxO3u2Fpz34vs72xm03SRfg6bMNGfMJIQEpQjKRvkG2JvT6oRJFpDtSrwbX8Jzvw==",
+      "version": "4.1.3",
+      "resolved": "https://registry.npmjs.org/webpack-merge/-/webpack-merge-4.1.3.tgz",
+      "integrity": "sha512-zxwAIGK7nKdu5CIZL0BjTQoq3elV0t0MfB7rUC1zj668geid52abs6hN/ACwZdK6LeMS8dC9B6WmtF978zH5mg==",
       "dev": true,
       "requires": {
         "lodash": "^4.17.5"

js/package.json

@@ -26,7 +26,7 @@
     "node-sass": "^4.5.3",
     "webpack": "^4.12.0",
     "webpack-cli": "^3.0.8",
-    "webpack-merge": "^4.1.2",
+    "webpack-merge": "^4.1.3",
     "karma": "^2.0.3"
   },
   "scripts": {