Bump webpack-merge from 4.1.4 to 4.1.5 in /apps/accessibility

Bumps [webpack-merge](https://github.com/survivejs/webpack-merge) from 4.1.4 to 4.1.5.
- [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/commits)

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

apps/accessibility/package-lock.json

@@ -2522,7 +2522,8 @@
         "ansi-regex": {
           "version": "2.1.1",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "optional": true
         },
         "aproba": {
           "version": "1.2.0",
@@ -2937,7 +2938,8 @@
         "safe-buffer": {
           "version": "5.1.1",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "optional": true
         },
         "safer-buffer": {
           "version": "2.1.2",
@@ -2993,6 +2995,7 @@
           "version": "3.0.1",
           "bundled": true,
           "dev": true,
+          "optional": true,
           "requires": {
             "ansi-regex": "^2.0.0"
           }
@@ -3036,12 +3039,14 @@
         "wrappy": {
           "version": "1.0.2",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "optional": true
         },
         "yallist": {
           "version": "3.0.2",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "optional": true
         }
       }
     },
@@ -5652,9 +5657,9 @@
       }
     },
     "webpack-merge": {
-      "version": "4.1.4",
-      "resolved": "https://registry.npmjs.org/webpack-merge/-/webpack-merge-4.1.4.tgz",
-      "integrity": "sha512-TmSe1HZKeOPey3oy1Ov2iS3guIZjWvMT2BBJDzzT5jScHTjVC3mpjJofgueEzaEd6ibhxRDD6MIblDr8tzh8iQ==",
+      "version": "4.1.5",
+      "resolved": "https://registry.npmjs.org/webpack-merge/-/webpack-merge-4.1.5.tgz",
+      "integrity": "sha512-sVcM+MMJv6DO0C0GLLltx8mUlGMKXE0zBsuMqZ9jz2X9gsekALw6Rs0cAfTWc97VuWS6NpVUa78959zANnMMLQ==",
       "dev": true,
       "requires": {
         "lodash": "^4.17.5"

apps/accessibility/package.json

@@ -28,6 +28,6 @@
 		"vue-template-compiler": "^2.5.17",
 		"webpack": "^4.27.1",
 		"webpack-cli": "^3.1.2",
-		"webpack-merge": "^4.1.4"
+		"webpack-merge": "^4.1.5"
 	}
 }