Upgrade webpack, webpack-cli, and webpack-dev-server

package.json

@@ -138,9 +138,9 @@
     "vue-virtual-scroll-list": "^1.3.1",
     "vuedraggable": "^2.23.0",
     "vuex": "^3.1.0",
-    "webpack": "^4.29.0",
+    "webpack": "^4.40.2",
     "webpack-bundle-analyzer": "^3.3.2",
-    "webpack-cli": "^3.2.1",
+    "webpack-cli": "^3.3.9",
     "webpack-stats-plugin": "^0.2.1",
     "worker-loader": "^2.0.0",
     "xterm": "^3.5.0"
@@ -200,7 +200,7 @@
     "stylelint-scss": "^3.9.2",
     "timezone-mock": "^1.0.8",
     "vue-jest": "^4.0.0-beta.2",
-    "webpack-dev-server": "^3.1.14",
+    "webpack-dev-server": "^3.8.1",
     "yarn-deduplicate": "^1.1.1"
   },
   "resolutions": {