Update artifact and user agent versions

- Updated the artifact version in config.json and README.md from "6.0.0-beta" to "6.0.0-SNAPSHOT".
- Updated the user agent version in ApiInvoker.java from "6.0.0-beta" to "6.0.0-SNAPSHOT".

README.md

@@ -28,7 +28,7 @@ Add this dependency to your project's POM:
 <dependency>
     <groupId>io.conekta</groupId>
     <artifactId>conektasdk</artifactId>
-    <version>6.0.0-beta</version>
+    <version>6.0.0-SNAPSHOT</version>
     <scope>compile</scope>
 </dependency>
 ```
@@ -38,7 +38,7 @@ Add this dependency to your project's POM:
 Add this dependency to your project's build file:
 
 ```groovy
-compile "io.conekta:conektasdk:6.0.0-beta"
+compile "io.conekta:conektasdk:6.0.0-SNAPSHOT"
 ```
 
 ### Others
@@ -49,7 +49,7 @@ At first generate the JAR by executing:
 
 Then manually install the following JARs:
 
-- target/conektasdk-6.0.0-beta.jar
+- target/conektasdk-6.0.0-SNAPSHOT.jar
 - target/lib/*.jar
 
 ## Getting Started

config.json

@@ -6,7 +6,7 @@
   "developerOrganization": "Conekta, Inc.",
   "developerOrganizationUrl": "https://www.conekta.io",
   "artifactUrl": "https://developers.conekta.com/",
-  "artifactVersion": "6.0.0-beta",
+  "artifactVersion": "6.0.0-SNAPSHOT",
   "modelPackage": "io.conekta.model",
   "licenseName": "MIT License",
   "invokerPackage": "io.conekta",
@@ -25,7 +25,7 @@
   "disallowAdditionalPropertiesIfNotPresent": true,
   "useOneOfDiscriminatorLookup": true,
   "serializationLibrary": "gson",
-  "httpUserAgent": "Conekta/v2 Android/6.0.0-beta",
+  "httpUserAgent": "Conekta/v2 Android/6.0.0-SNAPSHOT",
   "openApiNullable" : false,
   "apiVersion" :"application/vnd.conekta-v2.1.0+json",
   "templateDir": "local/templates",

src/main/java/io/conekta/ApiInvoker.java

@@ -95,7 +95,7 @@ public class ApiInvoker {
     DATE_FORMAT.setTimeZone(TimeZone.getTimeZone("UTC"));
 
     // Set default User-Agent.
-    setUserAgent("Conekta/v2 Android/6.0.0-beta");
+    setUserAgent("Conekta/v2 Android/6.0.0-SNAPSHOT");
   }
 
   public static void setUserAgent(String userAgent) {