Comment by sivoais

Perl's CPAN has tooling for diffing versions through the use of MetaCPAN (a top-notch site which every language should try to emulate). For example, here is a diff of the URI distribution:

https://metacpan.org/diff/file?target=ETHER%2FURI-1.71%2F&so...

This information is also available through an API for integration into command line tools.