Update various plugin dependencies (#7)

* jacoco-maven-plugin from 0.8.5 -> 0.8.6
* maven-resources-plugin from 3.1.0 -> 3.2.0
* maven-site-plugin from 3.8.2 -> 3.9.1
* maven-surefire-plugin from 3.0.0-M4 -> 3.0.0-M5
* versions-maven-plugin from 2.7 -> 2.8.1

pom.xml

@@ -81,7 +81,7 @@
         <mockito.version>3.5.15</mockito.version>
 
         <!-- Versions for plugins -->
-        <jacoco-maven-plugin.version>0.8.5</jacoco-maven-plugin.version>
+        <jacoco-maven-plugin.version>0.8.6</jacoco-maven-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-deploy-plugin.version>3.0.0-M1</maven-deploy-plugin.version>
@@ -91,13 +91,13 @@
         <maven-jar-plugin.version>3.2.0</maven-jar-plugin.version>
         <maven-javadoc-plugin.version>3.2.0</maven-javadoc-plugin.version>
         <maven-release-plugin.version>2.5.3</maven-release-plugin.version>
-        <maven-resources-plugin.version>3.1.0</maven-resources-plugin.version>
-        <maven-site-plugin.version>3.8.2</maven-site-plugin.version>
+        <maven-resources-plugin.version>3.2.0</maven-resources-plugin.version>
+        <maven-site-plugin.version>3.9.1</maven-site-plugin.version>
         <maven-source-plugin.version>3.2.1</maven-source-plugin.version>
-        <maven-surefire-plugin.version>3.0.0-M4</maven-surefire-plugin.version>
+        <maven-surefire-plugin.version>3.0.0-M5</maven-surefire-plugin.version>
         <nexus-staging-maven-plugin.version>1.6.8</nexus-staging-maven-plugin.version>
         <sonar-maven-plugin.version>3.7.0.1746</sonar-maven-plugin.version>
-        <versions-maven-plugin.version>2.7</versions-maven-plugin.version>
+        <versions-maven-plugin.version>2.8.1</versions-maven-plugin.version>
 
         <!-- Build properties -->
         <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>