## Environment
**Liquibase Version**: org.liquibase:liquibase-core:jar:3.8.9

**Liquibase Integration & Version**: maven

**Database Vendor & Version**: postgres 11

**Operating System Type & Version**: ubuntu (wsl)

## Description
PrimaryKey constraint does not honor 'deferrable' and 'initiallyDeferred' settings so that created primary key is not 'deferred'

## Steps To Reproduce
Use script:

```
<databaseChangeLog xmlns="http://www.liquibase.org/xml/ns/dbchangelog"
                   xmlns:ext="http://www.liquibase.org/xml/ns/dbchangelog-ext"
                   xmlns:pro="http://www.liquibase.org/xml/ns/pro"
                   xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
                   xsi:schemaLocation="http://www.liquibase.org/xml/ns/dbchangelog-ext http://www.liquibase.org/xml/ns/dbchangelog/dbchangelog-ext.xsd http://www.liquibase.org/xml/ns/pro http://www.liquibase.org/xml/ns/pro/liquibase-pro-4.0.xsd http://www.liquibase.org/xml/ns/dbchangelog http://www.liquibase.org/xml/ns/dbchangelog/dbchangelog-4.0.xsd">
    <changeSet author="author" id="some-id">  
        <createTable tableName="abc">
            <column name="id" type="INTEGER">
                <constraints nullable="false" primaryKey="true" primaryKeyName="abc_PK" deferrable="true" initiallyDeferred="true"/>
            </column>
        </createTable>
    </changeSet>
</databaseChangeLog>
```

## Actual Behavior
2020-12-18 09:01:19.936 [main] INFO  liquibase.executor.jvm.JdbcExecutor - CREATE TABLE public.abc (id INTEGER NOT NULL, CONSTRAINT "abc_PK" PRIMARY KEY (id))

## Expected/Desired Behavior
PRIMARY KEY is created with _deferrable initially deferred_


package liquibase.statement.core;
import liquibase.datatype.LiquibaseDataType;
import liquibase.statement.*;
import java.util.*;
public class CreateTableStatement extends AbstractSqlStatement implements CompoundStatement {
    private String catalogName;
    private String schemaName;
    private String tableName;
    private String tablespace;
    private String remarks;
    private List<String> columns = new ArrayList<>();
    private Set<AutoIncrementConstraint> autoIncrementConstraints = new HashSet<>();
    private Map<String, LiquibaseDataType> columnTypes = new HashMap<>();
    private Map<String, Object> defaultValues = new HashMap<>();
    private Map<String, String> defaultValueConstraintNames = new HashMap<>();
    private Map<String, String> columnRemarks = new HashMap<>();
    private PrimaryKeyConstraint primaryKeyConstraint;
    private Map<String,NotNullConstraint> notNullConstraints = new HashMap<String, NotNullConstraint>();
    private Set<ForeignKeyConstraint> foreignKeyConstraints = new HashSet<ForeignKeyConstraint>();
    /* NOT NULL constraints in RDBMSs are curious beasts. In some RDBMS, they do not exist as constraints at all, i.e.
       they are merely a property of the column. In others, like Oracle DB, they can exist in both forms, and to be
       able to give the NN constraint a name in CREATE TABLE, we need to save both the NN property as well as the NN constraint. To make things even more complicated, you cannot just add a NN constraint after the list