update: shell

update_dev.sh

@@ -1,4 +1,5 @@
 git fetch --all && git reset --hard origin/dev && git pull origin dev
+git checkout dev
 rm -rf composer.lock composer.phar
 wget https://github.com/composer/composer/releases/latest/download/composer.phar -O composer.phar
 php composer.phar update -vvv