debian/control: Rename libapt-pkg4.15 -> libapt-pkg5.0

debian/control

@@ -39,7 +39,7 @@ Description: commandline package manager
   * apt-config as an interface to the configuration settings
   * apt-key as an interface to manage authentication keys
 
-Package: libapt-pkg4.15
+Package: libapt-pkg5.0
 Architecture: any
 Multi-Arch: same
 Pre-Depends: ${misc:Pre-Depends}