## 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_


String column = columnIterator.next();
            DatabaseDataType columnType = statement.getColumnTypes().get(column).toDatabaseDataType(database);
            buffer.append(database.escapeColumnName(statement.getCatalogName(), statement.getSchemaName(), statement.getTableName(), column, true));
            buffer.append(" ").append(columnType);
            AutoIncrementConstraint autoIncrementConstraint = null;
            for (AutoIncrementConstraint currentAutoIncrementConstraint : statement.getAutoIncrementConstraints()) {
                if (column.equals(currentAutoIncrementConstraint.getColumnName())) {
                    autoIncrementConstraint = currentAutoIncrementConstraint;
                    break;
                }
            }
            boolean isAutoIncrementColumn = autoIncrementConstraint != null;
            boolean isPrimaryKeyColumn = (statement.getPrimaryKeyConstraint() != null) && statement
                    .getPrimaryKeyConstraint().getColumns().contains(column);
            isPrimaryKeyAutoIncrement = isPrimaryKeyAutoIncrement || (isPrimaryKeyColumn && isAutoIncrementColumn);
            if ((database instanceof SQLiteDatabase) &&
                    isSinglePrimaryKeyColumn &&
                    isPrimaryKeyColumn &&
                    isAutoIncrementColumn) {
                String pkName = StringUtil.trimToNull(statement.getPrimaryKeyConstraint().getConstraintName());
                if (pkName == null) {
                    pkName = database.generatePrimaryKeyName(statement.getTableName());
                }
                if (pkName != null) {
                    buffer.append(" CONSTRAINT ");
                    buffer.append(database.escapeConstraintName(pkName));
                }
                buffer.append(" PRIMARY KEY");
            }