latexdiff: update to v1.4.0, fix livecheck

tex/latexdiff/Portfile

@@ -4,8 +4,7 @@ PortSystem          1.0
 PortGroup           perl5 1.0
 
 name                latexdiff
-version             1.3.4
-revision            0
+version             1.4.0
 categories          tex
 maintainers         nomaintainer
 license             GPL-3+
@@ -22,9 +21,11 @@ long_description    \
 homepage            http://www.ctan.org/pkg/latexdiff
 master_sites        https://github.com/ftilmann/${name}/releases/download/${version}/
 
-checksums           rmd160  246cc355346d2c67a1d2da09b2d4348aaad35421 \
-                    sha256  aed1c39d51e5c7a8894a5e4b7190106e93968dd90edcc0dde803fcbffe01b2b4 \
-                    size    562146
+checksums           rmd160  7d9ca503e55cd0190c9cf2017a2344e90304de18 \
+                    sha256  2aaea10ae1a9c1b975c9dc933da6ac6f83f665eea76b358daf86b97b606912ea \
+                    size    595240
+
+worksrcdir          ${name}
 
 perl5.branches      5.34
 
@@ -60,5 +61,5 @@ destroot {
 }
 
 livecheck.type      regex
-livecheck.url       ${homepage}
-livecheck.regex     "<td>(\\d+(\\.\\d+)*) .*</td>"
+livecheck.url       https://github.com/ftilmann/${name}/releases/latest
+livecheck.regex     {latexdiff/releases/tag/([0-9.]+)}