Fix dependency version and update README

Author: Mina Nesiem

README.md

@@ -8,7 +8,7 @@
 
 XE.com Inc. is the World's Trusted Currency Authority. This project provides an SDK to interface with our XE Currency Data (XECD) product.
 
-XE Currency Data is a REST API that gives you access daily or live rates and historic mid-market conversion rates between all of our supported currencies. 
+XE Currency Data is a REST API that gives you access to daily or live rates and historic mid-market conversion rates between all of our supported currencies. 
 
 You will need an api key and secret to use this sdk. Sign up for a [free trial][5] or register for a [full account][6].
 

composer.json

@@ -14,8 +14,8 @@
     "license": "proprietary",
     "require": {
         "php": ">=5.6.0",
-        "xe/framework-base-client": "^3.0@dev",
-        "xe/xecd-rates-core-component": "^1.0@dev",
+        "xe/framework-base-client": "^0.1",
+        "xe/xecd-rates-core-component": "^0.1",
         "symfony/serializer": "^3.0|^2.8",
         "symfony/property-access": "^3.0|^2.8",
         "goaop/framework": "^2.0"