graphics/autotrace: Update to 0.31.10

• Switch from PORTVERSION to DISTVERSION
• Update WWW
• Disable ming support permanently
• Enable "make test"

Changelog: https://github.com/autotrace/autotrace/releases/tag/0.31.10

Backport upstream commits:
eeeb813a416ff309804f6833729fab20d036e667
f436324241f4855325e64c6de0fb5be848a300f5
a26cfe0039f00012613edbe7cc5c58b623b3ea48
b32c25d16dadf85e6236b13aaf10edae52d810f4
a74b683a6bfeceeda8c4086a3eb559a98e950c95
3b148a17199ad730995614b143cceb6a9987cf07
bc1bcc06790b81db73c3bafab94c47f47a2ac8e8

Backport upstream PRs:

References:
https://github.com/autotrace/autotrace/commit/eeeb813a416ff309804f6833729fab20d036e667
https://github.com/autotrace/autotrace/commit/f436324241f4855325e64c6de0fb5be848a300f5
https://github.com/autotrace/autotrace/commit/a26cfe0039f00012613edbe7cc5c58b623b3ea48
https://github.com/autotrace/autotrace/commit/b32c25d16dadf85e6236b13aaf10edae52d810f4
https://github.com/autotrace/autotrace/commit/a74b683a6bfeceeda8c4086a3eb559a98e950c95
https://github.com/autotrace/autotrace/commit/3b148a17199ad730995614b143cceb6a9987cf07
https://github.com/autotrace/autotrace/commit/bc1bcc06790b81db73c3bafab94c47f47a2ac8e8
https://github.com/autotrace/autotrace/pull/151
https://github.com/autotrace/autotrace/pull/156

PR: 281870
Approved by: portmgr (maintainer timeout, 2+ weeks)