Improved outdated command

The outdated command now displays a table showing the status of all outdated packages.
The user is prompted to select which package to display release notes for.

v0.3

Add outdated sub command to display relevant release notes for all outdated composer packages in the current folder.

v0.2.1

Add Docker file and Docker instructions
Increase minimum PHP version to 8.1
Update dependencies

v0.1.6.1

Re-release

v0.1.6

Ignore releases with no release notes