fix: Add user friendly message for creationdate placeholder

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Core/src/main/java/com/plotsquared/core/util/placeholders/PlaceholderRegistry.java

@@ -164,7 +164,7 @@ public final class PlaceholderRegistry {
                     PlayerManager.getPlayerList(plot.getDenied(), player));
         });
         this.createPlaceholder("currentplot_creationdate", (player, plot) -> {
-            if (plot.getTimestamp() == 0) {
+            if (plot.getTimestamp() == 0 || !plot.hasOwner()) {
                 return legacyComponent(TranslatableCaption.of("info.unknown"), player);
             }
             long creationDate = plot.getTimestamp();

build.gradle.kts

@@ -19,7 +19,7 @@ plugins {
 }
 
 group = "com.plotsquared"
-version = "6.9.3"
+version = "6.9.4-SNAPSHOT"
 
 subprojects {
     group = rootProject.group
@@ -65,12 +65,12 @@ subprojects {
     }
 
     dependencies {
-        implementation(platform("com.intellectualsites.bom:bom-1.18.x:1.11"))
+        implementation(platform("com.intellectualsites.bom:bom-1.18.x:1.12"))
     }
 
     dependencies {
         // Tests
-        testImplementation("org.junit.jupiter:junit-jupiter:5.8.2")
+        testImplementation("org.junit.jupiter:junit-jupiter:5.9.0")
     }
 
     plugins.withId("java") {

renovate.json

@@ -1,9 +1,7 @@
 {
   "extends": [
-    "config:base",
+    "config:base"
-    ":disableDependencyDashboard"
   ],
   "labels": ["Renovate"],
-  "commitMessagePrefix": "build: ",
   "rebaseWhen": "conflicted"
 }