Add missing properties in cqn.SELECT

[daogrady]

Fixes #331

[mariayord]

@patricebender Could you please take a look at the PR? I am not sure if "search" is supported. At least I see in the test it is mentioned as not supported, but documented.
Also forUpdate has a parameter "of", but not documented.
Thanks!

[patricebender]

Also forUpdate has a parameter "of", but not documented.

true! I do not know this property either. As forUpdate is not relevant for me normalizing a CQN.

[kulliax]

@patricebender the of parameter is contained in the documentation and an sql command
hana: https://help.sap.com/docs/hana-cloud-data-lake/sql-reference-for-data-lake-relational-engine-sap-hana-db-managed/select-statement-for-sap-hana-database
pgsql: https://www.postgresql.org/docs/current/sql-select.html with better explanation