## 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_


return addColumn(columnName,columnType,defaultValue,null,constraints);
    }
    public CreateTableStatement addColumn(String columnName, LiquibaseDataType columnType, Object defaultValue, String remarks, ColumnConstraint... constraints) {
        return addColumn(columnName, columnType, null, defaultValue, remarks, constraints);
    }
    public CreateTableStatement addColumn(String columnName, LiquibaseDataType columnType, String defaultValueConstraintName, Object defaultValue, String remarks, ColumnConstraint... constraints) {
        this.getColumns().add(columnName);
        this.columnTypes.put(columnName, columnType);
        if (defaultValue != null) {
            defaultValues.put(columnName, defaultValue);
        }
        if (defaultValueConstraintName != null) {
            defaultValueConstraintNames.put(columnName, defaultValueConstraintName);
        }
        if(remarks != null) {
            this.columnRemarks.put(columnName, remarks);
        }
        if (constraints != null) {
            for (ColumnConstraint constraint : constraints) {
                if (constraint == null) {
                    continue;
                }
                if (constraint instanceof PrimaryKeyConstraint) {
                    if (this.getPrimaryKeyConstraint() == null) {
                        this.primaryKeyConstraint = (PrimaryKeyConstraint) constraint;
                    } else {
                        for (String column : ((PrimaryKeyConstraint) constraint).getColumns()) {
                            this.getPrimaryKeyConstraint().addColumns(column);
                        }
                    }