@babel/preset-env is default preset for babel 7

Replace add-module-exports plugin with babel 7 equivalent

--- a/.babelrc
+++ b/.babelrc
@@ -1,9 +1,9 @@
 {
     "presets": [
-        "es2015",
-        "stage-0"
+        "@babel/env",
     ],
     "plugins": [
-        "add-module-exports"
+        "@babel/proposal-export-default-from",
+        "@babel/proposal-export-namespace-from"
     ]
 }