## 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_


of columns, like you could do with UNIQUE, CHECK or FOREIGN KEY constraints. They must be defined
       in line with the column (this implies that a NN constraint can always affects exactly one column). */
    private HashMap<String, NotNullConstraint> notNullColumns = new HashMap<>();
    private Set<UniqueConstraint> uniqueConstraints = new LinkedHashSet<>();
    public CreateTableStatement(String catalogName, String schemaName, String tableName) {
        this.catalogName = catalogName;
        this.schemaName = schemaName;
        this.tableName = tableName;
    }
    public CreateTableStatement(String catalogName, String schemaName, String tableName,String remarks) {
        this(catalogName,schemaName,tableName);
        this.remarks = remarks;
    }
    public String getCatalogName() {
        return catalogName;
    }
    public String getSchemaName() {
        return schemaName;
    }
    public String getTableName() {
        return tableName;
    }
    public List<String> getColumns() {
        return columns;
    }
    public String getTablespace() {
        return tablespace;
    }
    public CreateTableStatement setTablespace(String tablespace) {
        this.tablespace = tablespace;