add dev requirements and update readme for packagist installation

Author: patrick-blom

README.md

@@ -28,15 +28,20 @@ admin order mail.
 
 ### Module installation via composer
 
+#### Default installation via packagist (recommend)
+* add the module to your shop composer.json
+    * `composer require patrick-blom/multi-ordermail-receiver`
+
+#### Alternative installation via GitHub (manual)
 * create a new folder called "thirdparty" with the subfolder "pb" at the shop root level (same level as the composer.json)
     * `cd <shop root>`
     * `mkdir -p thirdparty/pb`  
 * clone the repository to the new folder
     * `git clone [email protected]:patrick-blom/multi-ordermail-receiver.git thirdparty/pb/MultiOrderMailReceiver` 
 * navigate back to the shop root level and add the repository to composer.json
     * `composer config repositories.patrick-blom/multi-ordermail-receiver path thirdparty/pb/MultiOrderMailReceiver`
-* add the module to your shop composer.json
-    * `composer require patrick-blom/multi-ordermail-receiver`
+
+#### OXID eShop module activation (identical for default && alternative installation)
 * prepare the module configuration for eShop 6.2
     * `vendor/bin/oe-console oe:module:install-configuration source/modules/pb/MultiOrderMailReceiver/`
     * `vendor/bin/oe-console oe:module:apply-configuration`
@@ -64,7 +69,7 @@ The testing process should only be done in a development environment or CI pipel
 * Prepare the [OXID Testing Library](https://github.com/OXID-eSales/testing_library) likes described in their repository 
 or use the [oxvm_eshop](https://github.com/OXID-eSales/oxvm_eshop) / [docker-eshop-sdk](https://github.com/OXID-eSales/docker-eshop-sdk)
 * Add `pb/MultiOrderMailReceiver` to the partial module paths in your test_config.yml (e.g: `partial_module_paths: 'pb/MultiOrderMailReceiver'`)
-* Copy the `config.inc.TEST.php.dist` to your shop root and rename it to `config.inc.TEST.php`
+* Copy the `config.inc.TEST.php.dist` from the vendor module directory to your shop root and rename it to `config.inc.TEST.php`
 * Adjust the settings in the `config.inc.TEST.php` to your needs (test database name, error reporting, etc)
 * Modify your `config.inc.php` and ensure that the `config.inc.TEST.php` will be loaded during the tests
 ```php

composer.json

@@ -2,7 +2,7 @@
   "name": "patrick-blom/multi-ordermail-receiver",
   "description": "This is a module for the OXID eShop which extends the amount of admin order mail receivers.",
   "type": "oxideshop-module",
-  "keywords": ["oxid", "modules", "eShop", "emails", "order"],
+  "keywords": ["oxid", "module", "eShop", "emails", "order", "admin","carbon copy"],
   "homepage": "https://www.patrick-blom.de/",
   "version": "1.0",
   "license": [
@@ -18,7 +18,11 @@
     }
   },
   "require": {
-    "php": ">=7.1"
+    "php": ">=7.1",
+    "oxid-esales/oxideshop-ce": "^v6.5.3"
+  },
+  "require-dev": {
+    "oxid-esales/testing-library": "^v7.1.0"
   },
   "autoload": {
     "psr-4": {