Update webpack, webpack-cli; require node 10.13.0+

.nvmrc

@@ -1 +1 @@
-v10
+v12

package.json

@@ -49,9 +49,9 @@
     "prettier": "^2.0.5",
     "ts-node": "^8.4.1",
     "typescript": "^3.7.5",
-    "webpack": "^4.42.0",
+    "webpack": "^4",
     "webpack-bundle-analyzer": "^3.6.0",
-    "webpack-cli": "^3.3.9"
+    "webpack-cli": "^4.1.0"
   },
   "scripts": {
     "build:schemas": "mkdir -p dist/npm/common && cp -r src/common/schemas dist/npm/common/",
@@ -77,7 +77,7 @@
   },
   "readmeFilename": "README.md",
   "engines": {
-    "node": ">=8",
+    "node": ">=10.13.0",
     "yarn": "^1.15.2"
   }
 }