% cd ~/auto-reply-sakura
% composer update
...
% git status
On branch master
Your branch is up to date with 'origin/master'.
Untracked files:
(use "git add <file>..." to include in what will be committed)
composer.lock
nothing added to commit but untracked files present (use "git add" to track)
composer.lock
ファイルはcomposer.lock.debug
とリネームして提供しておいて.gitignore
で除外した方がいいと思います。