Moved AbstractHTTPProvider to separate package (#685)

* Moved AbstractHTTPProvider to separate package

* cs

* Bugfix

Author: Nyholm

Provider/AbstractHttpProvider.php

@@ -13,20 +13,11 @@
     ],
     "require": {
         "php": "^7.0",
-        "igorw/get-in": "^1.0",
-        "psr/http-message-implementation": "^1.0",
-        "php-http/client-implementation": "^1.0",
-        "php-http/message-factory": "^1.0.2",
-        "php-http/httplug": "^1.0",
-        "php-http/discovery": "^1.0"
+        "igorw/get-in": "^1.0"
     },
     "require-dev": {
         "phpunit/phpunit": "^6.1",
-        "symfony/stopwatch": "~2.5",
-        "php-http/message": "^1.0",
-        "php-http/curl-client": "^1.7",
-        "php-http/mock-client": "^0.3.0",
-        "nyholm/psr7": "^0.2.2"
+        "symfony/stopwatch": "~2.5"
     },
     "suggest": {
         "symfony/stopwatch": "If you want to use the TimedGeocoder"