Revert dd1b19f and fix calls to GuzzleHttp\Psr7\Request

This lets us stop locking to Guzzle 6.2 and properly fix the
random errors by only sending a Guzzle body if one was set in the
Eseye call.

Also, fixes #8

composer.json

@@ -4,7 +4,7 @@
     "type": "library",
     "require": {
         "php": ">= 7.0",
-        "guzzlehttp/guzzle": "6.2.*",
+        "guzzlehttp/guzzle": "^6.2",
         "nesbot/carbon": "^1.21",
         "monolog/monolog": "^1.22",
         "predis/predis": "^1.1"

src/Eseye.php

@@ -45,7 +45,7 @@ class Eseye
     /**
      * The Eseye Version.
      */
-    const VERSION = '0.0.8';
+    const VERSION = '0.0.9';
 
     /**
      * @var \Seat\Eseye\Containers\EsiAuthentication

src/Fetchers/GuzzleFetcher.php

@@ -160,11 +160,18 @@ public function httpRequest(
         $this->logger->debug('Making ' . $method . ' request to ' . $uri);
         $start = microtime(true);
 
+
+        // Json encode the body if it has data, else just null it
+        if (count($body) > 0)
+            $body = json_encode($body);
+        else
+            $body = null;
+
         try {
 
             // Make the _actual_ request to ESI
             $response = $this->getClient()->send(
-                new Request($method, $uri, $headers, json_encode($body)));
+                new Request($method, $uri, $headers, $body));
 
         } catch (ClientException $e) {