xml2rfc: update to 3.31.0, use Python 3.14

textproc/xml2rfc/Portfile

@@ -4,7 +4,7 @@ PortSystem          1.0
 PortGroup           python 1.0
 
 name                xml2rfc
-version             3.19.1
+version             3.31.0
 revision            0
 
 categories          textproc
@@ -19,11 +19,11 @@ long_description    Generate RFCs and IETF drafts from document source in XML \
 
 homepage            https://github.com/ietf-tools/xml2rfc
 
-checksums           rmd160  be7f38e76abff35e3234085fece0d0c57b6c913b \
-                    sha256  49e5319041c9afb66650aea429520f3199dfaac382c6fcf06a4a03c9b3646136 \
-                    size    2654379
+checksums           rmd160  0a54cdf48b4167fed860698e95c6b2657ba8f95d \
+                    sha256  0a1d4ccc4425aed39b5f0f833a8eb1e0f9e8f1897d3441c3a15877dee36cf484 \
+                    size    422008
 
-python.default_version  312
+python.default_version  314
 
 depends_lib-append      port:py${python.version}-platformdirs \
                         port:py${python.version}-configargparse \
@@ -34,5 +34,4 @@ depends_lib-append      port:py${python.version}-platformdirs \
                         port:py${python.version}-country \
                         port:py${python.version}-yaml \
                         port:py${python.version}-requests \
-                        port:py${python.version}-six \
                         port:py${python.version}-wcwidth