Use peerDependency for @babel register/node/cli.

packages/babel-node/README.md

@@ -7,7 +7,7 @@ babel-node is a CLI that works exactly the same as the Node.js CLI, with the add
 ## Install
 
 ```sh
-npm install --save-dev @babel/node
+npm install --save-dev @babel/core @babel/node
 ```
 
 ## Usage

packages/babel-node/package.json

@@ -16,7 +16,6 @@
     "compiler"
   ],
   "dependencies": {
-    "@babel/core": "7.0.0-beta.5",
     "@babel/polyfill": "7.0.0-beta.5",
     "@babel/register": "7.0.0-beta.5",
     "commander": "^2.8.1",
@@ -25,6 +24,9 @@
     "output-file-sync": "^2.0.0",
     "v8flags": "^3.0.0"
   },
+  "peerDependencies": {
+    "@babel/core": ">=7.0.0-beta.4 <7.0.0-rc.0"
+  },
   "devDependencies": {
     "@babel/helper-fixtures": "7.0.0-beta.5"
   },