feat: 更新gradle版本并优化指令部分的重复代码

currency-plugin/build.gradle

@@ -5,7 +5,7 @@ plugins {
 }
 
 group 'cn.hamster3'
-version '2.2.8'
+version '2.2.9'
 
 repositories {
     maven {
@@ -20,7 +20,7 @@ dependencies {
     compileOnly "cn.hamster3:HamsterService-Bukkit:2.8.3-SNAPSHOT"
     compileOnly "cn.hamster3:HamsterAPI:2.4.8-SNAPSHOT"
     compileOnly 'net.milkbowl.vault:VaultAPI:1.7'
-    compileOnly "me.clip:placeholderapi:2.10.9"
+    compileOnly "me.clip:placeholderapi:2.11.6"
 
     compileOnly rootProject.fileTree(dir: './libs', includes: ['*.jar'])
 }
@@ -39,7 +39,7 @@ java {
 
 jar {
     archivesBaseName = "HamsterCurrency"
-    destinationDir(rootProject.buildDir)
+    destinationDirectory = rootProject.layout.buildDirectory
 }
 
 tasks.withType(JavaCompile).configureEach {
@@ -62,8 +62,8 @@ publishing {
             url = 'https://maven.airgame.net/public/'
 
             credentials {
-                username maven_username
-                password maven_password
+                username = findProperty("MAVEN_AIRGAME_USERNAME")?.toString() ?: ""
+                password = findProperty("MAVEN_AIRGAME_PASSWORD")?.toString() ?: ""
             }
         }
     }