Code clean

- Imports/exports always at top
- Sapper template not needing a div to execute
- NPM packages updates: @rollup/plugin-commonjs 11.1.0 has a bug about import/exports

package.json

@@ -32,9 +32,9 @@
     "@babel/plugin-transform-runtime": "^7.9.0",
     "@babel/preset-env": "^7.9.5",
     "@babel/runtime": "^7.9.2",
-    "@rollup/plugin-alias": "^3.0.1",
-    "@rollup/plugin-commonjs": "^11.0.2",
-    "@rollup/plugin-node-resolve": "^7.1.1",
+    "@rollup/plugin-alias": "^3.1.0",
+    "@rollup/plugin-commonjs": "11.0.2",
+    "@rollup/plugin-node-resolve": "^7.1.2",
     "@rollup/plugin-replace": "^2.3.1",
     "autoprefixer": "^9.7.6",
     "babel-plugin-module-resolver": "^4.0.0",