updated readme & composer file

Author: ekta-slit

composer.json

@@ -8,8 +8,11 @@
     "autoload": {
         "psr-0": { "Sendinblue": "src/" }
     },
-    "minimum-stability": "dev",
-    "prefer-stable": true,
+    "extra": {
+        "branch-alias": {
+            "dev-master": "1.0.x-dev"
+        }
+    },
     "homepage": "https://github.com/mailin-api/mailin-api-php",
     "authors": [ 
         {

src/Sendinblue/README.md

@@ -11,7 +11,7 @@ This is the SendinBlue Php library. It implements the various exposed APIs that
 
     ```{
         "require": {
-            "mailin-api/mailin-api-php": "dev-master"
+            "mailin-api/mailin-api-php": "1.0.*"
         }
     }```
 
@@ -23,7 +23,7 @@ OR
  * Simply install by running below command
 
     ```
-    composer require mailin-api/mailin-api-php:dev-master
+    composer require mailin-api/mailin-api-php
     ```
     
 You can use below sample script to get started.