bump up VERSION to 2.82 in various places, there is still some more issue to be fixed before release.

src/LinearMath/btSerializer.h

@@ -438,7 +438,7 @@ public:
 
 			buffer[9] = '2';
 			buffer[10] = '8';
-			buffer[11] = '1';
+			buffer[11] = '2';
 
 		}