Upgrade to bzip2 1.0.6.
diff --git a/PCbuild/pyproject.vsprops b/PCbuild/pyproject.vsprops
index ae5570b..7135d7e 100644
--- a/PCbuild/pyproject.vsprops
+++ b/PCbuild/pyproject.vsprops
@@ -78,7 +78,7 @@
 	/>

 	<UserMacro

 		Name="bz2Dir"

-		Value="$(externalsDir)\bzip2-1.0.5"

+		Value="$(externalsDir)\bzip2-1.0.6"

 	/>

 	<UserMacro

 		Name="opensslDir"