Fix build function with Babel

package.json

@@ -10,10 +10,9 @@
   "private": true,
   "scripts": {
     "dev": "sapper dev --port 3000",
-    "build": "sapper build dist",
-    "export": "sapper export export",
-    "start": "node __sapper__/build",
-    "serve": "node server/server.js"
+    "build": "sapper build dist --legacy",
+    "export": "sapper export export --legacy",
+    "start": "node dist"
   },
   "dependencies": {
     "animejs": "^3.2.0",
@@ -26,7 +25,8 @@
     "scroll-out": "^2.2.8",
     "sirv": "^0.4.2",
     "svelte-lazy": "^0.1.11",
-    "swipe-listener": "^1.1.0"
+    "swipe-listener": "^1.1.0",
+    "node-fetch": "^2.6.0"
   },
   "devDependencies": {
     "@babel/core": "^7.9.6",
@@ -41,12 +41,11 @@
     "@rollup/plugin-replace": "^2.3.2",
     "autoprefixer": "^9.7.6",
     "dotenv": "^8.2.0",
-    "node-fetch": "^2.6.0",
     "node-sass": "^4.14.1",
     "postcss": "^7.0.29",
     "postcss-load-config": "^2.1.0",
     "postcss-preset-env": "^6.7.0",
-    "rollup": "^2.8.2",
+    "rollup": "^2.9.0",
     "rollup-plugin-glslify": "^1.2.0",
     "rollup-plugin-svelte": "^5.2.1",
     "rollup-plugin-terser": "^5.3.0",