Revert "transform babel runtime"

This reverts commit 4ed643e.

.babelrc

@@ -1,4 +1,3 @@
 {
-  "presets": ["@babel/preset-react", "@babel/preset-env"],
-  "plugins": ["@babel/plugin-transform-runtime"]
+  "presets": ["@babel/preset-react", "@babel/preset-env"]
 }

package.json

@@ -1,6 +1,6 @@
 {
   "name": "react-bootstrap-image-cropper",
-  "version": "0.2.3",
+  "version": "0.2.2",
   "description": "Select, crop, preview, edit, all in one!",
   "keywords": [
     "react-bootstrap",
@@ -20,7 +20,6 @@
   "homepage": "https://zhaoyao91.github.io/react-bootstrap-image-cropper",
   "license": "MIT",
   "peerDependencies": {
-    "@babel/runtime": "^7.6.0",
     "react": "^16.8.3",
     "react-bootstrap": "^1.0.0-beta.10"
   },
@@ -31,7 +30,6 @@
   "devDependencies": {
     "@babel/cli": "^7.6.0",
     "@babel/core": "^7.6.0",
-    "@babel/plugin-transform-runtime": "^7.6.0",
     "@babel/preset-env": "^7.6.0",
     "@babel/preset-react": "^7.0.0",
     "gh-pages": "^2.1.1",