upgrade dependencies

lib/build.js

@@ -19,16 +19,7 @@ function webpackConfig(dir, additionalConfig) {
   var babelOpts = {cacheDirectory: true};
   if (!fs.existsSync(path.join(process.cwd(), '.babelrc'))) {
     babelOpts.presets = [
-      ["env", {
-        targets: {
-          node: getBabelTarget(envConfig)
-        }
-      }]
-    ];
-    babelOpts.plugins = [
-      "transform-class-properties",
-      "transform-object-assign",
-      "transform-object-rest-spread"
+      ["@babel/preset-env", {targets: {node: getBabelTarget(envConfig)}}],
     ];
   }
 
@@ -47,6 +38,7 @@ function webpackConfig(dir, additionalConfig) {
   });
 
   var webpackConfig = {
+    mode: "production",
     module: {
       rules: [
         {

package.json

@@ -20,19 +20,16 @@
     "url": "https://github.com/netlify/netlify-lambda/issues"
   },
   "dependencies": {
-    "babel-core": "^6.26.0",
-    "babel-loader": "^7.1.2",
-    "babel-plugin-transform-class-properties": "^6.24.1",
-    "babel-plugin-transform-object-assign": "^6.22.0",
-    "babel-plugin-transform-object-rest-spread": "^6.26.0",
-    "babel-preset-env": "^1.6.1",
+    "@babel/core": "^7.0.0",
+    "@babel/preset-env": "^7.0.0",
+    "babel-loader": "^8.0.0",
     "base-64": "^0.1.0",
-    "body-parser": "^1.18.2",
-    "commander": "^2.11.0",
-    "express": "^4.16.2",
+    "body-parser": "^1.18.3",
+    "commander": "^2.17.1",
+    "express": "^4.16.3",
     "express-logging": "^1.1.1",
     "toml": "^2.3.3",
-    "webpack": "^3.8.1",
-    "webpack-merge": "^4.1.1"
+    "webpack": "^4.17.1",
+    "webpack-merge": "^4.1.4"
   }
 }