refactor: push react-dom to devDependencies and update both to 16

Author: skipjack

package.json

@@ -31,8 +31,7 @@
   "peerDependencies": {
     "leaflet": "^1.0.0",
     "react-leaflet": "^1.0.0",
-    "react": "^15.4.1 || ^16.0.0",
-    "react-dom": "^15.4.1 || ^16.0.0"
+    "react": "^15.4.1 || ^16.0.0"
   },
   "devDependencies": {
     "babel-cli": "^6.6.5",
@@ -53,9 +52,9 @@
     "eslint-plugin-react": "^4.2.3",
     "leaflet": "^1.0.0",
     "prop-types": "^15.5.10",
-    "react": "^15.4.1",
+    "react": "^16.0.0",
     "react-addons-test-utils": "^0.14.7",
-    "react-dom": "^15.4.1",
+    "react-dom": "^16.0.0",
     "react-leaflet": "^1.0.0",
     "react-transform-hmr": "^1.0.4",
     "webpack": "^1.12.14",