docs: update api version [skip ci]

Author: Jiankai Zheng

README.md

@@ -159,13 +159,13 @@ Latest official release:
 <dependency>
   <groupId>nl.jiankai</groupId>
     <artifactId>spotify-web-api-wrapper</artifactId>
-    <version>1.5.5</version>
+    <version>1.5.6</version>
 </dependency>
 ```
 ### Gradle
 Latest official release:
 ```gradle
-implementation 'nl.jiankai:spotify-web-api-wrapper:1.5.5'
+implementation 'nl.jiankai:spotify-web-api-wrapper:1.5.6'
 ```
 
 ## Contributing

pom.xml

@@ -6,7 +6,7 @@
 
     <groupId>nl.jiankai</groupId>
     <artifactId>spotify-web-api-wrapper</artifactId>
-    <version>1.5.5</version>
+    <version>1.5.6</version>
 
     <name>Spotify Web API Java Wrapper</name>
     <description>A Java Wrapper for Spotify's Web API</description>