add proper versioning

build.gradle

@@ -2,6 +2,9 @@ plugins {
     id 'java'
 }
 
+group = "dev.ivycollective"
+version = project.version
+
 repositories {
     mavenCentral()
     maven {
@@ -14,12 +17,18 @@ dependencies {
     compileOnly "io.papermc.paper:paper-api:1.21-R0.1-SNAPSHOT"
 }
 
-def targetJavaVersion = 21
 java {
-    def javaVersion = JavaVersion.toVersion(targetJavaVersion)
-    sourceCompatibility = javaVersion
-    targetCompatibility = javaVersion
-    if (JavaVersion.current() < javaVersion) {
-        toolchain.languageVersion = JavaLanguageVersion.of(targetJavaVersion)
+    sourceCompatibility = JavaVersion.VERSION_21
+    targetCompatibility = JavaVersion.VERSION_21
+    toolchain {
+        languageVersion = JavaLanguageVersion.of(21)
+    }
+}
+
+processResources {
+    filesMatching("plugin.yml") {
+        expand(
+            "version": project.version
+        )
     }
 }

gradle.properties

@@ -0,0 +1 @@
+version=STAGING

src/main/resources/plugin.yml

@@ -1,5 +1,5 @@
 name: cloudflare-tunnels-plugin
-version: STAGING
+version: "${version}"
 main: dev.ivycollective.cloudflaretunnelsplugin.CloudflareTunnelsPlugin
 description: Run a Cloudflare Tunnels daemon
 authors: [ ivycollective ]