Bug#880780: pygdchart2 build depends on removed libgd2*-dev provides

[Adrian Bunk]

Source: pygdchart2
Version: 0.beta1-3.7
Severity: serious
Tags: buster sid

The following packages have unmet dependencies:
 builddeps:pygdchart2 : Depends: libgd2-noxpm-dev but it is not installable or
                                 libgd2-xpm-dev but it is not installable


Please update the build dependency to libgd-dev.