Update watch file

debian/watch

@@ -1,4 +1,5 @@
+
 version=4
-opts=pgpsigurlmangle=s/$/.asc/ \
-    https://github.com/appneta/tcpreplay/releases \
-    /appneta/tcpreplay/releases/download/[^/]+/tcpreplay-([0-9][.0-9]*)\.tar\.xz
+opts="searchmode=plain,pgpsigurlmangle=s/$/.asc/" \
+https://api.github.com/repos/appneta/@PACKAGE@/releases \
+    https://github.com/appneta/@PACKAGE@/releases/download/v[^/]+/@PACKAGE@-([0-9]+\.[0-9]+\.[0-9]+)@ARCHIVE_EXT@