upgrade libs

* webpack
* webpack-assets-manifest
* webpack-cli
* webpack-merge

package.json

@@ -204,11 +204,11 @@
     "terser-webpack-plugin": "^1.2.2",
     "throttle-debounce": "^2.0.0",
     "toastr": "^2.1.2",
-    "webpack": "^4.12.0",
-    "webpack-assets-manifest": "^3.0.1",
+    "webpack": "^4.29.3",
+    "webpack-assets-manifest": "^3.1.1",
     "webpack-bundle-analyzer": "^3.0.2",
-    "webpack-cli": "^3.0.8",
-    "webpack-merge": "~4.1.0"
+    "webpack-cli": "^3.2.3",
+    "webpack-merge": "^4.2.1"
   },
   "_moduleAliases": {
     "@root": ".",