update Install requirements on macOS
Ruby-based Homebrew installer is deprecated by original authors, and replaced Bash-based Installer.
(ref1: )
(ref2: )
note: /Homebrew/install/master/install also runs Bash-based installer now.
@@ -43,7 +43,7 @@ sudo apt -y install cmake gcc g++ libncurses5-dev libreadline-dev libssl-dev mak
## Install requirements on macOS
```bash
-/usr/bin/ruby -e "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/master/install)"
+/bin/bash -c "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/master/install.sh)"
brew install cmake openssl readline
```
