我想在NodeJS项目中使用最新版本的React Native，但我遇到了一些错误。即使我按照说明操作，我也看不出这一切是怎么回事。我该如何解决这个问题？
运行brew install node后，我收到此错误：
Warning: node 8.2.1 is already installed, it's just not linked.
You can use `brew link node` to link this version.
公平。所以现在我按照它说brew link node跑了，我收到了这个错误：
Error: Could not symlink bin/node
Target /usr/local/bin/node
already exists. You may want to remove it:
rm '/usr/local/bin/node'
To force the link and overwrite all conflicting files:
brew link --overwrite node
To list all files that would be deleted:
brew link --overwrite --dry-run node
再次公平。所以我跑了brew link --overwrite node，我收到了这个错误：
Linking /usr/local/Cellar/node/8.2.1...
Error: Could not symlink share/doc/node/gdbinit
/usr/local/share/doc/node is not writable.