Document Drupal Development Env: composer/plugin/drupal-development-environment#1

docs/composer/plugin/drupal-dev-environment/index.md

@@ -12,7 +12,7 @@ This composer plugin builds all necessary structures of a Drupal project for dev
 It provides a massive amount of testing tools, which can be executed out of the box using 
 [Ahoy](../../plugin/ahoy/index.md):
 
-- [Dependency Analysis](../../../dev_tools/test.md#php-code-sniffer)
+- [Dependency Analysis](../../../dev_tools/test.md#drupal-dependency-analysis)
 - [PHP Unit](../../../dev_tools/test.md#unitkernelfunctional-testing)
 - [PHP Code Sniffer](../../../dev_tools/test.md#php-code-sniffer)
 - [PHP PHPStan](../../../dev_tools/test.md#php-code-sniffer)

docs/dev_tools/test.md

@@ -14,6 +14,30 @@ code analysis to unit testing.
 You also have to set up your environment with the tool [l3d](../docker/l3d/index.md). The composer plugin 
 [Drupal Development Environment](../composer/plugin/drupal-dev-environment/index.md) does all the setup for you.
 
+## Drupal Dependency Analysis
+
+This tools provides a very useful functionality. You can check, if there are new versions of a module. We have the following
+categories:
+
+- Direct dependencies required in composer.json
+- Transitive dependencies not required in composer.json
+
+Usage:
+
+```l3d
+a test outdated
+```
+
+Note: **This can take a while depending on your installation.**
+
+Provides an output something like this:
+
+```l3d
+Transitive dependencies not required in composer.json:
+drupal/blazy                  2.16.0             2.27.0       Provides..
+```
+
+
 ## Static Code Analysis
 
 We have several tools to perform static code analysis.