Bump @babel/preset-env from 7.6.3 to 7.7.1 (#376)

Bump @babel/preset-env from 7.6.3 to 7.7.1

package.json

@@ -60,7 +60,7 @@
   "main": "dist/js/tabler.js",
   "homepage": "https://tabler.io",
   "devDependencies": {
-    "@babel/preset-env": "7.6.3",
+    "@babel/preset-env": "7.7.1",
     "browser-sync": "2.26.7",
     "bundlesize": "0.18.0",
     "clean-css-cli": "4.3.0",