Partial support Composite Primary Key

Merge pull request #2 from salvosav/support-composite-pk

partial support for composire primary key

TableDef is now ordered by ordinal_position

1.0.0.2

schema is now ordered. It's usufull if you use autodb to automaticall…

Exclude the _sqlResource property from serialization

Excluded the _sqlResource property from serialization.
Reason: PHP 8+ does not allow serialization of database connection resources like PgSql\Connection.
Upon unserialization, you will need to manually re-establish the database connection if needed.

PHP 8.3 support

1.0.0.0

fix strlen