Merge changes I34319d70,I43fad374,Ie531a253,Id0dfcfd0

* changes:
  Finish upgrading eclipse-jarsigner-plugin to 1.3.1
  Upgrade maven-javadoc-plugin to 3.3.0
  Update maven-project-info-reports-plugin to 3.1.2
  Update spotbugs-maven-plugin to 4.2.3
diff --git a/org.eclipse.jgit.benchmarks/pom.xml b/org.eclipse.jgit.benchmarks/pom.xml
index ec57ef7..c394485 100644
--- a/org.eclipse.jgit.benchmarks/pom.xml
+++ b/org.eclipse.jgit.benchmarks/pom.xml
@@ -165,7 +165,7 @@
         <plugin>
           <groupId>org.apache.maven.plugins</groupId>
           <artifactId>maven-project-info-reports-plugin</artifactId>
-          <version>3.1.1</version>
+          <version>3.1.2</version>
         </plugin>
       </plugins>
     </pluginManagement>
diff --git a/pom.xml b/pom.xml
index 3e4d7d4..aefbdd4 100644
--- a/pom.xml
+++ b/pom.xml
@@ -168,12 +168,12 @@
     <httpcore-version>4.4.14</httpcore-version>
     <slf4j-version>1.7.30</slf4j-version>
     <log4j-version>1.2.15</log4j-version>
-    <maven-javadoc-plugin-version>3.2.0</maven-javadoc-plugin-version>
+    <maven-javadoc-plugin-version>3.3.0</maven-javadoc-plugin-version>
     <tycho-extras-version>1.7.0</tycho-extras-version>
     <gson-version>2.8.6</gson-version>
     <bouncycastle-version>1.65</bouncycastle-version>
-    <spotbugs-maven-plugin-version>4.2.2</spotbugs-maven-plugin-version>
-    <maven-project-info-reports-plugin-version>3.1.1</maven-project-info-reports-plugin-version>
+    <spotbugs-maven-plugin-version>4.2.3</spotbugs-maven-plugin-version>
+    <maven-project-info-reports-plugin-version>3.1.2</maven-project-info-reports-plugin-version>
     <maven-jxr-plugin-version>3.0.0</maven-jxr-plugin-version>
     <maven-surefire-plugin-version>3.0.0-M5</maven-surefire-plugin-version>
     <maven-surefire-report-plugin-version>${maven-surefire-plugin-version}</maven-surefire-report-plugin-version>
@@ -330,7 +330,7 @@
         <plugin>
           <groupId>org.eclipse.cbi.maven.plugins</groupId>
           <artifactId>eclipse-jarsigner-plugin</artifactId>
-          <version>1.1.7</version>
+          <version>1.3.1</version>
         </plugin>
         <plugin>
           <groupId>org.eclipse.tycho.extras</groupId>