* fixed #297 try out java15

Author: thomaswoehlke

pom.xml

@@ -67,46 +67,26 @@
     </distributionManagement>
 
     <properties>
-        <java.version>13</java.version>
-        <version.maven>3.6.3</version.maven>
+        <java.version>15</java.version>
+        <version.maven>3.6.2</version.maven>
+        <pmdVersion>6.28.0</pmdVersion>
 
         <!-- SCM and Releasing with Maven -->
         <maven.scm.version>1.11.2</maven.scm.version>
-        <maven-release-plugin.version>3.0.0-M1</maven-release-plugin.version>
-        <maven-deploy-plugin.version>3.0.0-M1</maven-deploy-plugin.version>
 
-        <!-- Maven plugins -->
-        <maven-antrun-plugin.version>3.0.0</maven-antrun-plugin.version>
-        <maven-assembly-plugin.version>3.3.0</maven-assembly-plugin.version>
-        <maven-clean-plugin.version>3.1.0</maven-clean-plugin.version>
-        <maven-compiler-plugin.version>3.8.1</maven-compiler-plugin.version>
-        <maven-dependency-plugin.version>3.1.2</maven-dependency-plugin.version>
-        <maven-enforcer-plugin.version>3.0.0-M3</maven-enforcer-plugin.version>
-        <maven-failsafe-plugin.version>3.0.0-M5</maven-failsafe-plugin.version>
-        <maven-help-plugin.version>3.2.0</maven-help-plugin.version>
-        <maven-install-plugin.version>3.0.0-M1</maven-install-plugin.version>
-        <maven-invoker-plugin.version>3.2.1</maven-invoker-plugin.version>
-        <maven-jar-plugin.version>3.2.0</maven-jar-plugin.version>
-        <maven-javadoc-plugin.version>3.2.0</maven-javadoc-plugin.version>
-        <maven-resources-plugin.version>3.1.0</maven-resources-plugin.version>
-        <maven-shade-plugin.version>3.2.4</maven-shade-plugin.version>
-        <maven-source-plugin.version>3.2.1</maven-source-plugin.version>
-        <maven-surefire-plugin.version>3.0.0-M5</maven-surefire-plugin.version>
-        <maven-war-plugin.version>3.3.1</maven-war-plugin.version>
-        <versions-maven-plugin.version>2.7</versions-maven-plugin.version>
-        <xml-maven-plugin.version>1.0.2</xml-maven-plugin.version>
-        <git-commit-id-plugin.version>4.0.1</git-commit-id-plugin.version>
+        <maven-release-plugin.version>3.0.0-M1</maven-release-plugin.version>
+        <liquibase-maven-plugin.version>3.8.9</liquibase-maven-plugin.version>
 
-        <!-- Maven Reports and Site -->
-        <maven-project-info-reports-plugin.version>3.1.0</maven-project-info-reports-plugin.version>
+        <!-- Maven Reports for Site -->
+        <maven-site-plugin.version>3.9.1</maven-site-plugin.version>
+        <maven-project-info-reports-plugin.version>3.1.1</maven-project-info-reports-plugin.version>
         <maven-checkstyle-plugin.version>3.1.1</maven-checkstyle-plugin.version>
         <maven-jxr-plugin.version>3.0.0</maven-jxr-plugin.version>
         <maven-pmd-plugin.version>3.13.0</maven-pmd-plugin.version>
-        <spotbugs-maven-plugin.version>4.0.4</spotbugs-maven-plugin.version>
-        <doxia-module-markdown.version>1.9.1</doxia-module-markdown.version>
-        <maven-pmd-plugin.version>3.13.0</maven-pmd-plugin.version>
+        <spotbugs-maven-plugin.version>4.1.3</spotbugs-maven-plugin.version>
         <maven-surefire-report-plugin.version>3.0.0-M5</maven-surefire-report-plugin.version>
-        <maven-site-plugin.version>3.9.1</maven-site-plugin.version>
+        <asciidoctor-maven-plugin.version>2.1.0</asciidoctor-maven-plugin.version>
+        <doxia-module-markdown.version>1.9.1</doxia-module-markdown.version>
         <doxia-module.version>1.9.1</doxia-module.version>
 
         <!-- Docker -->
@@ -136,21 +116,15 @@
 
         <!-- Spring Boot and Spring Frameworks -->
         <spring-boot-maven-plugin.version>${project.parent.version}</spring-boot-maven-plugin.version>
-
         <spring-data-releasetrain.version>Neumann-SR4</spring-data-releasetrain.version>
         <spring-session-bom.version>Dragonfruit-SR1</spring-session-bom.version>
-        <spring-framework.version>5.2.9.RELEASE</spring-framework.version>
-        <spring-security.version>5.3.4.RELEASE</spring-security.version>
 
         <!-- Unit and Integration Testing -->
-        <junit-jupiter.version>5.6.2</junit-jupiter.version>
         <xmlunit2.version>2.6.4</xmlunit2.version>
         <xmlunit.version>2.6.4</xmlunit.version>
         <htmlunit.version>2.43.0</htmlunit.version>
         <hamcrest.version>2.2</hamcrest.version>
-        <lombok.version>1.18.12</lombok.version>
         <jsoup.version>1.13.1</jsoup.version>
-
         <skipTests>true</skipTests>
     </properties>