Updating .parquetcppversion to 1.4.0.
diff --git a/.parquetcppversion b/.parquetcppversion
index d65937f..88c5fb8 100644
--- a/.parquetcppversion
+++ b/.parquetcppversion
@@ -1 +1 @@
-1.4.1-SNAPSHOT
+1.4.0