Update guzzle in lakia and bump vers.

Author: 005f

composer.json

@@ -1,11 +1,11 @@
 {
     "name": "medigo/laika",
-    "version": "2.0.0",
+    "version": "2.1.0",
     "type": "library",
     "homepage": "https://github.com/MEDIGO/laika-php",
     "license": "MIT",
     "require": {
-		    "guzzlehttp/guzzle": "~4.0"
+		    "guzzlehttp/guzzle": "~6.3"
     },
     "require-dev": {
         "phake/phake": "@stable"