Add DateHistogramAggregation

[Crmteam-IVG]

Add missing and needed date histogram aggregation

https://www.elastic.co/guide/en/elasticsearch/reference/current/search-aggregations-bucket-datehistogram-aggregation.html

[wgriffioen]

I've used your suggestion in the application I'm working on, but I needed an aggregation in the histogram. See the suggestion for how I've implemented the aggregations.

Suggested change

	public function __construct(string $name, string $field, string $calendarInterval)
	{
	$this->name = $name;
	$this->field = $field;
	$this->calendarInterval = $calendarInterval;
	}
	public function payload(): array
	{
	$parameters = [
	'field' => $this->field,
	'calendar_interval' => $this->calendarInterval,
	];
	return [
	'date_histogram' => $parameters,
	];
	}
	public function __construct(
	string $name,
	string $field,
	string $calendarInterval,
	Aggregation ...$aggregations
	) {
	$this->name = $name;
	$this->field = $field;
	$this->calendarInterval = $calendarInterval;
	$this->aggregations = new AggregationCollection(...$aggregations);
	}
	public static function create(string $name, string $field, string $calendarInterval, Aggregation ...$aggregations): self
	{
	return new self($name, $field, $calendarInterval, ...$aggregations);
	}
	public function payload(): array
	{
	$payload = [
	'date_histogram' => [
	'field' => $this->field,
	'calendar_interval' => $this->calendarInterval,
	],
	];
	if (! $this->aggregations->isEmpty()) {
	$payload['aggs'] = $this->aggregations->toArray();
	}
	return $payload;
	}

[Crmteam-IVG]

@wgriffioen thank you for the feedback. I've added sub aggregations and tests as well.

It would be great if this PR can now be reviewed and merged.