Upgrade NPM dependencies/packages

package-lock.json

         }
       }
     },
+    "uglify-js": {
+      "version": "2.8.29",
+      "resolved": "https://registry.npmjs.org/uglify-js/-/uglify-js-2.8.29.tgz",
+      "integrity": "sha1-KcVzMUgFe7Th913zW3qcty5qWd0=",
+      "dev": true,
+      "requires": {
+        "source-map": "0.5.7",
+        "uglify-to-browserify": "1.0.2",
+        "yargs": "3.10.0"
+      },
+      "dependencies": {
+        "yargs": {
+          "version": "3.10.0",
+          "resolved": "https://registry.npmjs.org/yargs/-/yargs-3.10.0.tgz",
+          "integrity": "sha1-9+572FfdfB0tOMDnTvvWgdFDH9E=",
+          "dev": true,
+          "requires": {
+            "camelcase": "1.2.1",
+            "cliui": "2.1.0",
+            "decamelize": "1.2.0",
+            "window-size": "0.1.0"
+          }
+        }
+      }
+    },
     "uglify-to-browserify": {
       "version": "1.0.2",
       "resolved": "https://registry.npmjs.org/uglify-to-browserify/-/uglify-to-browserify-1.0.2.tgz",
       "optional": true
     },
     "uglifyjs-webpack-plugin": {
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-      "resolved": "https://registry.npmjs.org/uglifyjs-webpack-plugin/-/uglifyjs-webpack-plugin-1.1.1.tgz",
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+      "version": "1.1.2",
+      "resolved": "https://registry.npmjs.org/uglifyjs-webpack-plugin/-/uglifyjs-webpack-plugin-1.1.2.tgz",
+      "integrity": "sha512-k07cmJTj+8vZMSc3BaQ9uW7qVl2MqDts4ti4KaNACXEcXSw2vQM2S8olSk/CODxvcSFGvUHzNSqA8JQlhgUJPw==",
       "dev": true,
       "requires": {
         "cacache": "10.0.1",
       }
     },
     "webpack": {
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-      "resolved": "https://registry.npmjs.org/webpack/-/webpack-3.8.1.tgz",
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+      "version": "3.9.1",
+      "resolved": "https://registry.npmjs.org/webpack/-/webpack-3.9.1.tgz",
+      "integrity": "sha512-jONJ0l8nqgiQVkqs15O9TFWLozbFkCgVodVrBXBK/PIBFeGkaOGo30Ov57iQqYRwAWNDM5vyLPZYmAIpPa5QSw==",
       "dev": true,
       "requires": {
         "acorn": "5.2.1",
             "has-flag": "2.0.0"
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-        "uglify-js": {
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-          "resolved": "https://registry.npmjs.org/uglify-js/-/uglify-js-2.8.29.tgz",
-          "integrity": "sha1-KcVzMUgFe7Th913zW3qcty5qWd0=",
-          "dev": true,
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-            "uglify-to-browserify": "1.0.2",
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-              "resolved": "https://registry.npmjs.org/yargs/-/yargs-3.10.0.tgz",
-              "integrity": "sha1-9+572FfdfB0tOMDnTvvWgdFDH9E=",
-              "dev": true,
-              "requires": {
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-                "cliui": "2.1.0",
-                "decamelize": "1.2.0",
-                "window-size": "0.1.0"
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         "uglifyjs-webpack-plugin": {
           "version": "0.4.6",
           "resolved": "https://registry.npmjs.org/uglifyjs-webpack-plugin/-/uglifyjs-webpack-plugin-0.4.6.tgz",

package.json

     "karma-webpack": "1.8.1",
     "precommit-hook": "3.0.0",
     "string-replace-loader": "1.3.0",
-    "uglifyjs-webpack-plugin": "1.1.1",
-    "webpack": "3.8.1"
+    "uglifyjs-webpack-plugin": "1.1.2",
+    "webpack": "3.9.1"
   },
   "scripts": {
     "lint": "eslint . && flow",