update build to babel7

.babelrc

@@ -1,26 +1,15 @@
 {
   "env": {
     "development": {
-      "presets": [ "es2015", "stage-0" ],
-      "plugins": [
-        ["transform-es2015-classes", { "loose": true }],
-        "transform-proto-to-assign"
-      ]
-    },
-    "rollup": {
-      "presets": [ ["es2015", { "modules": false }], "stage-0"  ],
-      "plugins": [
-        "external-helpers",
-        ["transform-es2015-classes", { "loose": true }],
-        "transform-proto-to-assign"
-      ]
+      "presets": ["@babel/preset-env", "@babel/react"],
+      "plugins": ["@babel/plugin-transform-runtime"]
     },
     "jsnext": {
-      "presets": [ ["es2015", { "modules": false }], "stage-0"  ],
-      "plugins": [
-        ["transform-es2015-classes", { "loose": true }],
-        "transform-proto-to-assign"
-      ]
+      "presets": [
+        ["@babel/preset-env", { "modules": false, "useBuiltIns": false }],
+        "@babel/react"
+      ],
+      "plugins": ["@babel/plugin-transform-runtime"]
     }
   }
 }