Using --upgrade option

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$ php-tests --upgrade
Current version: 0.7.0
New version found: 0.7.1
Updating...
Installing package
0.7.0@c1729a8 -> 🆕 0.7.1@872b081
Update complete

You can add version to update to (e.g. to rollback after update)

$ php-tests --upgrade=0.7.0
You are already using this version: 0.7.0

Note: Check releases tab for the latest version number

Also allowed to use master and develop versions

php-tests --upgrade=master

php-tests --upgrade=develop

Note: upgrade function considers master or develop versions as latest. To upgrade later to a numbered version you should use the option --upgrade=<version-number>. Simple --upgrade won't work as you expect.