Upgrade Babel to version 7

.babelrc

@@ -1,3 +1,3 @@
 {
-  "presets": ["env"]
+  "presets": ["@babel/preset-env"]
 }

package.json

@@ -1,10 +1,10 @@
 {
   "name": "rural-attractivness-service",
   "version": "1.0.0",
-  "description": "Web service for Rural Attractivness app",
-  "main": "index.js",
+  "description": "Web service for Rural Attractiveness app",
+  "main": "dist/index.js",
   "scripts": {
-    "build": "babel index.js -d dist",
+    "build": "babel index.js helpers.js nuts-data.js -d dist",
     "start": "nodemon index.js"
   },
   "author": "František Zadražil",
@@ -19,8 +19,8 @@
     "r-script": "0.0.4"
   },
   "devDependencies": {
-    "babel-cli": "^6.26.0",
-    "babel-preset-env": "^1.7.0",
+    "@babel/cli": "^7.17.6",
+    "@babel/preset-env": "^7.16.11",
     "nodemon": "^2.0.2"
   }
 }