Release 0.6.4 did not include any actual changes

[maksverver]

What happened?

It looks like tag 0.6.4 was made to the wrong commit. It includes a version bump but not the actual changes described in the changelog.

$ git diff 0.6.3 0.6.4 pycosat.c CHANGELOG 
diff --git a/CHANGELOG b/CHANGELOG
index d3ad430..4f58110 100644
--- a/CHANGELOG
+++ b/CHANGELOG
@@ -1,3 +1,8 @@
+2022-10-24   0.6.4:
+-------------------
+  * Fix memory leak in blocksol() when iterating over solutions
+
+
 2017-10-29   0.6.3:
 -------------------
   * Revert 'always use Python memory manager'
diff --git a/pycosat.c b/pycosat.c
index 2197176..bc130c0 100644
--- a/pycosat.c
+++ b/pycosat.c
@@ -5,7 +5,7 @@
   uses an MIT style license.
 */
 #define PYCOSAT_URL  "https://pypi.python.org/pypi/pycosat"
-#define PYCOSAT_VERSION  "0.6.3"
+#define PYCOSAT_VERSION  "0.6.4"
 
 #include <Python.h>

It seems like the intent was to include commit 537448e which fixed the memory leak reported in #38 and fixed in #54, but that's not actually in the release. Those changes do exist at HEAD, though.

Could you please create a new release that includes the latest changes?