Release 1.9.2

Note: To upgrade from 1.9.1 to 1.9.2, you only need to install the 1.9.2
binary. There's no need to run

ALTER EXTENSION pg_squeeze UPDATE;

Bug fixes

1. Fix possible escalation of privileges

One problem this release fixes is that index functions used to run as the
superuser. If they contained malicious code, it would have the superuser
privileges too. This is fixed by changing the current user to the table owner
before any index function can be executed.

Another problem was that pg_squeeze could use SQL operators other than the
built-in ones when checking table metadata (i.e. when checking which table is
bloated enough to need squeezing). This is fixed by restricting the search
path to "pg_catalog, pg_temp" before running any SQL query.

1. Fix handling of indexes with non-key columns.

If the identity index (typically the index the primary key is based on)
contains non-key column(s) (i.e. INCLUDE clause was used in the CREATE INDEX
command), attempt to squeeze the table failed.