Support text and string queries on text metadata fields

Change-Id: I2c3e406f071828df6b6757a9101892a2739d316f
diff --git a/Changes b/Changes
index 7ed178a..0970e7d 100644
--- a/Changes
+++ b/Changes
@@ -1,4 +1,4 @@
-0.57 2018-03-28
+0.57 2018-04-04
         - [feature] Support text queries in metadata (diewald)
 
 0.56.2 2018-03-23