Bump webpack from 4.37.0 to 4.38.0 in /apps/files

Bumps [webpack](https://github.com/webpack/webpack) from 4.37.0 to 4.38.0.
- [Release notes](https://github.com/webpack/webpack/releases)
- [Commits](webpack/webpack@v4.37.0...v4.38.0)

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

apps/files/package.json

@@ -29,7 +29,7 @@
     "vue-loader": "^15.7.1",
     "vue-template-compiler": "^2.6.10",
     "vue2-dropzone": "^3.6.0",
-    "webpack": "^4.36.1",
+    "webpack": "^4.38.0",
     "webpack-cli": "^3.3.5",
     "webpack-merge": "^4.2.1"
   },

apps/files/yarn.lock

@@ -5452,10 +5452,10 @@ webpack-sources@^1.3.0:
     source-list-map "^2.0.0"
     source-map "~0.6.1"
 
-webpack@^4.36.1:
-  version "4.37.0"
-  resolved "https://registry.yarnpkg.com/webpack/-/webpack-4.37.0.tgz#3508ef10f7996612c2be6026076d89760f776f54"
-  integrity sha512-iJPPvL7XpbcbwOthbzpa2BSPlmGp8lGDokAj/LdWtK80rsPoPOdANSbDBf2GAVLKZD3GhCuQ/gGkgN9HWs0Keg==
+webpack@^4.38.0:
+  version "4.38.0"
+  resolved "https://registry.yarnpkg.com/webpack/-/webpack-4.38.0.tgz#6d77108404b08883c78f4e7e45a43c4e5c47c931"
+  integrity sha512-lbuFsVOq8PZY+1Ytz/mYOvYOo+d4IJ31hHk/7iyoeWtwN33V+5HYotSH+UIb9tq914ey0Hot7z6HugD+je3sWw==
   dependencies:
     "@webassemblyjs/ast" "1.8.5"
     "@webassemblyjs/helper-module-context" "1.8.5"