Add pgtype TODO notes

v3.md

@@ -62,3 +62,21 @@ Further clean up logging interface -- still some pre-loglevel code in place
 Possibly integrate internal logging support with context. Possibly add method that adds arbitrary pgx log data to context. Or add ability to configure what key(s) pgx looks at for additional log context.
 Consider whether to switch to logrus style or stick with log15 style logs
 Keep ability to change logging while running
+
+consider test to ensure that AssignTo makes copy of reference types
+something like:
+select array[1,2,3], array[4,5,6,7]
+
+pgtype TODO:
+numrange
+numeric[]
+point
+line
+lseg
+box
+path
+path
+polygon
+circle
+macaddr
+varbit