[feature] Update composer improve-composer-dependencies

psr/http-client-implementation
psr/http-factory-implementation
psr/http-message-implementation

CHANGELOG.md

@@ -10,6 +10,11 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 - Removed dependency on `league/iso3166`
 - Removed dependency on `ext-bcmath`
 
+### Changed
+- Added dependency on `psr/http-client-implementation`
+- Added dependency on `psr/http-message-implementation`
+- Added dependency on `psr/http-factory-implementation` 
+
 ## [3.0.2] - 2020-09-03
 ### Fixed
 - Fix bug where issuers wouldn't be able to load because of wrong issuer code type (int instead of string)

README.md

@@ -16,13 +16,26 @@ To install the SDK, use the following composer command:
 composer require multisafepay/php-sdk
 ```
 
-WARNING: This PHP SDK does not have a direct dependency on Guzzle or cURL. Instead, it uses the [PSR-18](https://www.php-fig.org/psr/psr-18/) client abstraction. This will give you the flexibility to choose whatever [PSR-7 implementation and HTTP client](https://packagist.org/providers/php-http/client-implementation) you want to use. All clients can be replaced without any side effects.
+WARNING: This PHP SDK does not have a direct dependency on Guzzle or cURL. 
+Instead, it uses the [PSR-18](https://www.php-fig.org/psr/psr-18/) client abstraction and [PSR-17](https://www.php-fig.org/psr/psr-18/) factory abstraction.
+This will give you the flexibility to choose whatever [PSR-7 implementation and HTTP client](https://packagist.org/providers/psr/http-client-implementation) you want to use. 
+All clients can be replaced without any side effects.
 
-If you don't have a client yet, use the following:
+If you don't have any client implementation installed, use the following:
 ```bash
 composer require php-http/guzzle6-adapter guzzlehttp/psr7
 ```
 
+If you don't have any factory implementation installed, use the following:
+```bash
+composer require http-interop/http-factory-guzzle
+```
+
+In short, you need to have installed:
+- [PSR-18 client implementation](https://packagist.org/providers/psr/http-client-implementation)
+- [PSR-17 factory implementation](https://packagist.org/providers/psr/http-factory-implementation)
+- [PSR-7 message implementation](https://packagist.org/providers/psr/http-message-implementation)
+
 ## Getting started
 Use Composer autoloader to automatically load class dependencies: 
 

composer.json

@@ -7,12 +7,10 @@
   "require": {
     "php": "^7.1",
     "ext-json": "*",
-    "psr/http-message": "^1.0",
-    "php-http/client-implementation": "^1.0",
-    "php-http/httplug": "^2.0",
-    "php-http/discovery": "^1.0",
-    "php-http/message": "^1.7",
-    "psr/http-factory": "^1.0"
+    "psr/http-client-implementation": "^1.0",
+    "psr/http-message-implementation": "^1.0",
+    "psr/http-factory-implementation": "^1.0",
+    "php-http/discovery": "^1.0"
   },
   "require-dev": {
     "phpunit/phpunit": "^7.5 || ^6.5",