HomebrewでComposerをインストールした時に、下記のようなエラーでインストールできなかった。 Error: An unexpected error occurred during the `brew link` step The formula built, but is not symlinked into /usr/local Permission denied - /usr/local/lib/php Error: Permission denied - /usr/local/lib/php $ brew doctor Please note that these warnings are just used to help the Homebrew maintainers with debugging if you file an issue. If everythin