fix: This line doesn't meet the POSIX standard, and may cause compatibility problems.
add: A syntax highlighting tool for zsh. Included by git submodule function. Plugin home, https://github.com/zsh-users/zsh-syntax-highlighting.
add: Update the support of git submodules. Including install instrument, installation tool and upgrade tool.
Merge branch 'master' into new
Merge branch 'fix_upgrade_tool'
Merge branch 'add_submodule'