chore: update version to 6.0.0 and adjust dependencies in README

Author: abel533

README.md

@@ -28,7 +28,7 @@
 <dependency>
     <groupId>tk.mybatis</groupId>
     <artifactId>mapper</artifactId>
-    <version>6.0.0-beta</version>
+    <version>6.0.0</version>
 </dependency>
 ```
 

pom.xml

@@ -35,7 +35,7 @@
     <url>https://mybatis.io</url>
 
     <properties>
-        <revision>6.0.0-beta</revision>
+        <revision>6.0.0</revision>
         <maven.compiler.source>17</maven.compiler.source>
         <maven.compiler.target>17</maven.compiler.target>
         <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>