The latest version of APT can be downloaded from Softpedia
APT (Advanced Package Tool), a set of core tools inside Debian that makes it possible to install, remove, and keep applications up to date, is now at version 0.9.13.1.Advanced Package Tool was launched back in 1998, and 15 years later it's almost at version 1.0. The developers are still releasing small increments and it will take a while to get to 1.0.
Highlights of APT 0.9.13.1:
• "apt-get --purge build-dep" has been fixed;
• A regression that affected APT::Keep-Fds has been fixed;
• The "-f" option to "build-dep" as sbuild has been added;
• The autopkgtest support has been added for the integration testsuite.
A complete list of changes and updates can be found in the official announcement. Download APT (Advanced Package Tool) 0.9.13.1 right now from Softpedia.
Remember that this is a development version and it should NOT be installed on production machines. It is intended for testing purposes only.