Update Maven plugins to their latest versions

pom.xml

@@ -24,22 +24,24 @@
 
         <!-- plugin versions -->
         <build-helper-maven-plugin.version>1.10</build-helper-maven-plugin.version>
-        <maven-compiler-plugin.version>3.1</maven-compiler-plugin.version>
-        <maven-dependency-plugin.version>2.10</maven-dependency-plugin.version>
+        <maven-compiler-plugin.version>3.7.0</maven-compiler-plugin.version>
+        <maven-clean-plugin.version>3.0.0</maven-clean-plugin.version>
+        <maven-site-plugin.version>3.7</maven-site-plugin.version>
+        <maven-dependency-plugin.version>3.0.2</maven-dependency-plugin.version>
         <maven-deploy-plugin.version>2.8.2</maven-deploy-plugin.version>
-        <maven-failsafe-plugin.version>2.18.1</maven-failsafe-plugin.version>
+        <maven-failsafe-plugin.version>2.20.1</maven-failsafe-plugin.version>
         <maven-install-plugin.version>2.5.2</maven-install-plugin.version>
-        <maven-jar-plugin.version>2.6</maven-jar-plugin.version>
-        <maven-javadoc-plugin.version>2.10.4</maven-javadoc-plugin.version>
-        <maven-resources-plugin.version>2.6</maven-resources-plugin.version>
-        <maven-source-plugin.version>2.4</maven-source-plugin.version>
-        <maven-surefire-plugin.version>2.18.1</maven-surefire-plugin.version>
-        <maven-war-plugin.version>2.6</maven-war-plugin.version>
+        <maven-jar-plugin.version>3.0.2</maven-jar-plugin.version>
+        <maven-javadoc-plugin.version>3.0.0</maven-javadoc-plugin.version>
+        <maven-resources-plugin.version>3.0.2</maven-resources-plugin.version>
+        <maven-source-plugin.version>3.0.1</maven-source-plugin.version>
+        <maven-surefire-plugin.version>2.20.1</maven-surefire-plugin.version>
+        <maven-war-plugin.version>3.2.0</maven-war-plugin.version>
         <maven-gpg-plugin.version>1.6</maven-gpg-plugin.version>
         <exec-maven-plugin.version>1.6.0</exec-maven-plugin.version>
-        <jacoco-maven-plugin.version>0.7.9</jacoco-maven-plugin.version>
+        <jacoco-maven-plugin.version>0.8.0</jacoco-maven-plugin.version>
         <coveralls-maven-plugin.version>4.3.0</coveralls-maven-plugin.version>
-        <asciidoctor-maven-plugin.version>1.5.5</asciidoctor-maven-plugin.version>
+        <asciidoctor-maven-plugin.version>1.5.6</asciidoctor-maven-plugin.version>
         <git-commit-id-plugin.version>2.2.4</git-commit-id-plugin.version>
         <flatten-maven-plugin.version>1.0.1</flatten-maven-plugin.version>
     </properties>
@@ -123,7 +125,6 @@
                 <!-- this fix is needed for the eclipse-plugin to get the right java-version -->
                 <groupId>org.apache.maven.plugins</groupId>
                 <artifactId>maven-compiler-plugin</artifactId>
-                <version>${maven-compiler-plugin.version}</version>
                 <configuration>
                     <source>${maven.compiler.source}</source>
                     <target>${maven.compiler.target}</target>
@@ -157,6 +158,21 @@
             <plugins>
                 <plugin>
                     <groupId>org.apache.maven.plugins</groupId>
+                    <artifactId>maven-compiler-plugin</artifactId>
+                    <version>${maven-compiler-plugin.version}</version>
+                </plugin>
+                <plugin>
+                    <groupId>org.apache.maven.plugins</groupId>
+                    <artifactId>maven-clean-plugin</artifactId>
+                    <version>${maven-clean-plugin.version}</version>
+                </plugin>
+                <plugin>
+                    <groupId>org.apache.maven.plugins</groupId>
+                    <artifactId>maven-site-plugin</artifactId>
+                    <version>${maven-site-plugin.version}</version>
+                </plugin>
+                <plugin>
+                    <groupId>org.apache.maven.plugins</groupId>
                     <artifactId>maven-deploy-plugin</artifactId>
                     <version>${maven-deploy-plugin.version}</version>
                 </plugin>