Updated the Client version to 7.4.0 + updated docs

BREAKING_CHANGES.md

@@ -6,8 +6,6 @@
 - When `delete` with an empty `id` an `Elasticsearch\Common\Exceptions\RuntimeException\Missing404Exception`
   exception is thrown. Previously it was a `Elasticsearch\Common\Exceptions\RuntimeException\InvalidArgumentException`.
 
-
-
 # 7.0
 
 - Requirement of PHP 7.1 instead of 7.0 that is not supported since 1 Jan 2019.

CHANGELOG.md

@@ -1,6 +1,19 @@
 ## Release 7.4.0
 
-
+- Added the code generation for endpoints and namespaces based on
+  the [REST API specification](https://github.com/elastic/elasticsearch/tree/v7.4.2/rest-api-spec/src/main/resources/rest-api-spec/api)
+  of Elasticsearch. This tool is available in `util/GenerateEndpoints.php`.
+  [#966](https://github.com/elastic/elasticsearch-php/pull/966)
+- Fixed the asciidoc [endpoints documentation](https://www.elastic.co/guide/en/elasticsearch/client/php-api/current/ElasticsearchPHP_Endpoints.html) based on the code generation 
+  using [Sami](https://github.com/FriendsOfPHP/Sami) project
+  [#966](https://github.com/elastic/elasticsearch-php/pull/966)
+- All the `experimental` and `beta` APIs are now signed with
+  a `@note` tag in the phpdoc section (e.g. [$client->rankEval()](https://github.com/elastic/elasticsearch-php/blob/master/src/Elasticsearch/Client.php)). For more information read the [experimental and beta APIs](docs/experimental-beta-apis.asciidoc)
+  section in the documentation.
+  [#966](https://github.com/elastic/elasticsearch-php/pull/966)
+- Removed `AlreadyExpiredException` since it has been removed
+  from Elasticsearch with https://github.com/elastic/elasticsearch/pull/24857
+  [#954](https://github.com/elastic/elasticsearch-php/pull/954)
 
 ## Release 7.3.0
 

README.md

@@ -10,6 +10,8 @@ To maintain consistency across all the low-level clients (Ruby, Python, etc.), c
 
 Starting from version 7.4.0, all the endpoints (and namespaces) are autogenerated using the [util/GenerateEndpoints.php](https://github.com/elastic/elasticsearch-php/blob/master/util/GenerateEndpoints.php) script. This script reads the [Elasticsearch API specs](https://github.com/elastic/elasticsearch/tree/master/rest-api-spec/src/main/resources/rest-api-spec/api) and generated the PHP classes for all the endpoints.
 
+Moreover from version 7.4.0, we added a `E_USER_DEPRECATED` notice if you use deprecated parameters for Elasticsearch.
+
 Features
 --------
 

docs/breaking-changes.asciidoc

@@ -1,6 +1,13 @@
 [[breaking_changes]]
 == Breaking changes from 6.x
 
+### E_USER_DEPRECATED notice when using deprecated parameters
+
+Starting from elasticsearch-php 7.4.0, we generate a PHP [E_USER_DEPRECATED](https://www.php.net/manual/en/errorfunc.constants.php)
+notice every time you use a deprecated parameters for Elasticsearch.
+We decided to add this notice to facilitate the code refactoring with the
+new API specification of Elasticsearch (e.g. the usage of typeless APIs, see below).
+
 ### Moving from types to typeless APIs in Elasticsearch 7.0
 
 Elasticsearch 7.0 deprecated APIs that accept types, introduced new typeless

docs/experimental-beta-apis.asciidoc

@@ -0,0 +1,51 @@
+[[experimental_and_beta_apis]]
+== Experimental and beta APIs
+
+The PHP client offers also `experimental` and `beta` APIs for Elasticsearch.
+
+The Elasticsearch API are marked using the following convention:
+
+- **Stable** APIs should be safe to use extensively in production. 
+  Any breaking changes to these APIs should only occur in major versions and
+  will be clearly documented in the breaking changes documentation for that
+  release.
+- **Beta** APIs are on track to become stable and permanent features.
+  Caution should be exercised in their use since it is possible we’d have to make
+  a breaking change to these APIs in a minor version, but we’ll avoid this
+  wherever possible.
+- **Experimental** APIs are just that - an experiment. An experimental API might
+  have breaking changes in any future version, or it might even be removed
+  entirely.
+
+All the `experimental` and `beta` APIs are marked with a `@note` tag in the
+phpdoc section of the code.
+
+=== Experimental
+
+The experimental APIs included in the current version of `elasticsearch-php` are:
+
+- [Ranking Evaluation](https://www.elastic.co/guide/en/elasticsearch/reference/7.4/search-rank-eval.html)
+
+[source,php]
+----
+$client = ClientBuilder::create()->build();
+$params = [
+    // ...
+];
+$result = $client->rankEval($params);
+----
+
+- [Painless Execute](https://www.elastic.co/guide/en/elasticsearch/painless/7.4/painless-execute-api.html)
+
+[source,php]
+----
+$client = ClientBuilder::create()->build();
+$params = [
+    // ...
+];
+$result = $client->scriptsPainlessExecute($params);
+----
+
+=== Beta
+
+There are no beta APIs in the current version of `elasticsearch-php`.

docs/index.asciidoc

@@ -37,4 +37,6 @@ include::breaking-changes.asciidoc[]
 
 include::community.asciidoc[]
 
+include::experimental-beta-apis.asciidoc[]
+
 include::build/classes.asciidoc[]