Updating .parquetcppversion to 1.2.0.
diff --git a/.parquetcppversion b/.parquetcppversion
index e920547..26aaba0 100644
--- a/.parquetcppversion
+++ b/.parquetcppversion
@@ -1 +1 @@
-1.2.1-SNAPSHOT
+1.2.0