chore: remove deprecated plugin wrapper (#33)

### What this PR does?
移除对已过时的 PluginWrapper 的引用

see also halo-dev/halo#6243

```release-note
None
```

build.gradle

@@ -14,7 +14,7 @@ repositories {
 }
 
 dependencies {
-    implementation platform('run.halo.tools.platform:plugin:2.8.0-SNAPSHOT')
+    implementation platform('run.halo.tools.platform:plugin:2.10.0-SNAPSHOT')
     compileOnly 'run.halo.app:api'
 
     testImplementation 'run.halo.app:api'

src/main/java/run/halo/sitemap/SitemapPlugin.java

@@ -1,8 +1,8 @@
 package run.halo.sitemap;
 
-import org.pf4j.PluginWrapper;
 import org.springframework.stereotype.Component;
 import run.halo.app.plugin.BasePlugin;
+import run.halo.app.plugin.PluginContext;
 
 /**
  * @author ryanwang
@@ -11,8 +11,8 @@
 @Component
 public class SitemapPlugin extends BasePlugin {
 
-    public SitemapPlugin(PluginWrapper wrapper) {
-        super(wrapper);
+    public SitemapPlugin(PluginContext pluginContext) {
+        super(pluginContext);
     }
 
     @Override

src/main/resources/plugin.yaml

@@ -9,7 +9,7 @@ metadata:
 spec:
   enabled: true
   version: 1.0.2
-  requires: ">=2.7.0"
+  requires: ">=2.10.0"
   author:
     name: Halo OSS Team
     website: https://github.com/halo-dev