build in 2024

pom.xml

@@ -11,7 +11,7 @@
 
     <properties>
         <java.version>1.8</java.version>
-        <kotlin.version>1.3.72</kotlin.version>
+        <kotlin.version>1.9.20</kotlin.version>
         <target>1.8</target>
         <start-class>inn.ocsf.bee.freigeld.FreiAppKt</start-class>
         <spring.version>2.3.1.RELEASE</spring.version>
@@ -20,7 +20,7 @@
     <parent>
         <groupId>org.springframework.boot</groupId>
         <artifactId>spring-boot-starter-parent</artifactId>
-        <version>2.3.1.RELEASE</version>
+        <version>2.7.18</version>
     </parent>
 
     <dependencies>
@@ -88,7 +88,7 @@
         <dependency>
             <groupId>org.jetbrains.kotlinx</groupId>
             <artifactId>kotlinx-coroutines-core</artifactId>
-            <version>1.1.0</version>
+            <version>1.8.0</version>
         </dependency>
 
         <dependency>
@@ -188,6 +188,11 @@
             <version>1.3</version>
         </dependency>
 
+        <dependency>
+            <groupId>org.jetbrains</groupId>
+            <artifactId>annotations</artifactId>
+            <version>23.0.0</version>
+        </dependency>
     </dependencies>
 
     <build>
@@ -294,4 +299,4 @@
             </plugin>
         </plugins>
     </build>
-</project>
+</project>

src/main/java/inn/ocsf/bee/freigeld/core/model/IExchangeTicket.java

@@ -1,6 +1,7 @@
 package inn.ocsf.bee.freigeld.core.model;
 
-import javax.annotation.Nullable;
+
+import org.jetbrains.annotations.Nullable;
 
 public interface IExchangeTicket extends ITicket {