Update watch file

debian/watch

@@ -1,4 +1,5 @@
 
-version=3
-https://github.com/irino/softflowd/releases \
-    /irino/softflowd/archive/softflowd-([0-9][.0-9]*)\.tar\.gz
+version=4
+opts="searchmode=plain,filenamemangle=s/$/.tar.gz/" \
+https://api.github.com/repos/irino/@PACKAGE@/releases \
+    https://api.github.com/repos/irino/@PACKAGE@/tarball/@PACKAGE@-v@ANY_VERSION@