Updating .parquetcppversion to 1.3.1.
diff --git a/.parquetcppversion b/.parquetcppversion
index 934ff7e..3a3cd8c 100644
--- a/.parquetcppversion
+++ b/.parquetcppversion
@@ -1 +1 @@
-1.3.2-SNAPSHOT
+1.3.1