Update npm dependencies.

package.json

@@ -9,10 +9,10 @@
 		"classnames": "^2.2.5"
 	},
 	"devDependencies": {
-		"archiver": "^2.1.1",
+		"archiver": "^3.0.0",
 		"autoprefixer": "^9.0.2",
 		"babel-core": "^6.26.0",
-		"babel-loader": "^7.1.2",
+		"babel-loader": "^7.1.5",
 		"babel-plugin-lodash": "3.3.4",
 		"babel-plugin-transform-object-rest-spread": "^6.26.0",
 		"babel-plugin-transform-react-jsx": "6.24.1",
@@ -22,12 +22,12 @@
 		"fs-extra": "^7.0.0",
 		"glob": "^7.1.2",
 		"minimist": "^1.2.0",
-		"node-sass": "4.9.2",
+		"node-sass": "4.11.0",
 		"node-wp-i18n": "^1.2.0",
-		"postcss-loader": "^2.0.9",
-		"raw-loader": "^0.5.1",
+		"postcss-loader": "^3.0.0",
+		"raw-loader": "^1.0.0",
 		"sass-loader": "^7.1.0",
-		"style-loader": "^0.21.0",
+		"style-loader": "^0.23.1",
 		"webpack": "^4.16.3",
 		"webpack-cli": "^3.1.0"
 	},