Don't hardcode version number in documentation

README.md

@@ -78,18 +78,9 @@ Run the following to use the latest stable version
 ```sh
 composer require phpoffice/phpword
 ```
-or if you want the latest master version
+or if you want the latest develop version
 ```sh
-    composer require phpoffice/phpword:dev-master
-```
-
-You can of course also manually edit your composer.json file
-```json
-{
-    "require": {
-       "phpoffice/phpword": "v0.18.*"
-    }
-}
+composer require phpoffice/phpword:dev-develop
 ```
 
 ## Getting started

docs/installing.rst

@@ -28,26 +28,18 @@ You just need to `add dependency <https://getcomposer.org/doc/04-schema.md#packa
 
 Example:
 
-.. code-block:: json
+.. code-block:: bash
 
-    {
-        "require": {
-           "phpoffice/phpword": "v0.18.*"
-        }
-    }
+    composer require phpoffice/phpword
 
 If you are a developer or if you want to help us with testing then fetch the latest branch for developers.
 Notice: all contributions must be done against the developer branch.
 
 Example:
 
-.. code-block:: json
+.. code-block:: bash
 
-    {
-        "require": {
-           "phpoffice/phpword": "dev-develop"
-        }
-    }
+    composer require phpoffice/phpword:dev-develop
 
 Using samples
 -------------