dvisvgm: update to 2.3.3

Use cxx11 1.1 PortGroup to make it work without further workarounds.
Add dependency on ghostscript. It may not be a strict dependency,
but dvisvgm is not as useful without it and it was linked anyway.

graphics/dvisvgm/Portfile

@@ -1,10 +1,10 @@
 # -*- coding: utf-8; mode: tcl; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- vim:fenc=utf-8:ft=tcl:et:sw=4:ts=4:sts=4
 
 PortSystem          1.0
-PortGroup           cxx11 1.0
+PortGroup           cxx11 1.1
 PortGroup           github 1.0
 
-github.setup        mgieseki dvisvgm 2.1.3
+github.setup        mgieseki dvisvgm 2.3.3
 conflicts           texlive-bin-extra
 categories          graphics textproc
 platforms           darwin
@@ -18,24 +18,16 @@ long_description    The command-line utility dvisvgm is a tool for TeX/LaTeX use
 homepage            http://dvisvgm.bplaced.net/
 github.tarball_from releases
 
-checksums           rmd160  11558bcc58e20c309e35812b27f69257da031626 \
-                    sha256  553215051e85882ab4658c294ed0483cd5009d295f0a38dfccb480367abfd170
+checksums           rmd160  44508632899f5ce37b15ff8b2a045e7669ae93d3 \
+                    sha256  3d9da5d51cd6ee1205acb741fb3f0cee4ab66a93db685c367e14280b0340a430
 
 depends_build       port:pkgconfig
 
 depends_lib         port:freetype \
+                    port:ghostscript \
                     port:potrace \
                     port:texlive-bin \
                     port:zlib
 
-# TODO: the binary links against $prefix/lib/libgs.dylib, figure out the details
-
-patchfiles          patch-doc-Makefile.in.diff
-
-if { ${configure.cxx_stdlib} ne "libc++" } {
-    configure.cxx_stdlib    libc++
-    depends_lib-append      port:libcxx
-}
-
 test.run            yes
 test.target         check