Sapper switched to rollup and amplify configuration

package.json

@@ -4,7 +4,7 @@
   "version": "0.0.1",
   "scripts": {
     "dev": "sapper dev",
-    "build": "sapper build",
+    "build": "sapper build --legacy",
     "export": "sapper export",
     "start": "node __sapper__/build",
     "cy:run": "cypress run",
@@ -20,7 +20,17 @@
     "npm-run-all": "^4.1.5",
     "sapper": "^0.27.0",
     "svelte": "^3.0.0",
-    "svelte-loader": "^2.9.0",
-    "webpack": "^4.7.0"
+    "@babel/core": "^7.0.0",
+    "@babel/plugin-syntax-dynamic-import": "^7.0.0",
+    "@babel/plugin-transform-runtime": "^7.0.0",
+    "@babel/preset-env": "^7.0.0",
+    "@babel/runtime": "^7.0.0",
+    "rollup": "^1.12.0",
+    "rollup-plugin-babel": "^4.0.2",
+    "rollup-plugin-commonjs": "^10.0.0",
+    "rollup-plugin-node-resolve": "^5.2.0",
+    "rollup-plugin-replace": "^2.0.0",
+    "rollup-plugin-svelte": "^5.0.1",
+    "rollup-plugin-terser": "^4.0.4"
   }
 }