diff --git a/webpack/webpack-demo/package-lock.json b/webpack/webpack-demo/package-lock.json
index 64d05e0..8fdb108 100644
--- a/webpack/webpack-demo/package-lock.json
+++ b/webpack/webpack-demo/package-lock.json
@@ -4,6 +4,12 @@
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   "requires": true,
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+      "resolved": "https://registry.npmjs.org/@types/webpack/-/webpack-4.41.27.tgz",
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+      "dev": true,
+      "requires": {
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+        "@types/node": "*",
+        "@types/tapable": "^1",
+        "@types/uglify-js": "*",
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+      "resolved": "https://registry.npmjs.org/@types/webpack-sources/-/webpack-sources-2.1.0.tgz",
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+      "dev": true,
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@@ -559,6 +635,12 @@
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@@ -755,6 +837,26 @@
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@@ -851,6 +953,33 @@
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+          "dev": true
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+      "version": "3.0.0",
+      "resolved": "https://registry.npmjs.org/clean-webpack-plugin/-/clean-webpack-plugin-3.0.0.tgz",
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+      "dev": true,
+      "requires": {
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+        "del": "^4.1.1"
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@@ -1096,6 +1225,24 @@
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+      "requires": {
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+        "css-what": "^3.2.1",
+        "domutils": "^1.7.0",
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@@ -1145,6 +1292,15 @@
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@@ -1271,12 +1427,64 @@
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+      "dev": true,
+      "requires": {
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+      "resolved": "https://registry.npmjs.org/dom-serializer/-/dom-serializer-0.2.2.tgz",
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+      "dev": true,
+      "requires": {
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+        "entities": "^2.0.0"
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@@ -1348,6 +1556,12 @@
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@@ -1357,6 +1571,41 @@
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@@ -2358,12 +2607,29 @@
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+      "resolved": "https://registry.npmjs.org/get-intrinsic/-/get-intrinsic-1.1.1.tgz",
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@@ -2540,6 +2827,12 @@
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+        "clean-css": "4.2.x",
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