Upgrade maven plugins (#175)

Author: EnricoMi

pom.xml

@@ -150,7 +150,7 @@
       <plugin>
         <groupId>org.codehaus.mojo</groupId>
         <artifactId>build-helper-maven-plugin</artifactId>
-        <version>3.3.0</version>
+        <version>3.4.0</version>
         <executions>
           <execution>
             <phase>generate-sources</phase>
@@ -235,7 +235,7 @@
       <plugin>
         <groupId>org.apache.maven.plugins</groupId>
         <artifactId>maven-surefire-plugin</artifactId>
-        <version>3.0.0</version>
+        <version>3.1.0</version>
         <configuration>
           <skipTests>false</skipTests>
         </configuration>
@@ -274,7 +274,7 @@
       <plugin>
         <groupId>org.apache.maven.plugins</groupId>
         <artifactId>maven-gpg-plugin</artifactId>
-        <version>3.0.1</version>
+        <version>3.1.0</version>
         <executions>
           <execution>
             <id>sign-artifacts</id>
@@ -288,7 +288,7 @@
       <plugin>
         <groupId>org.apache.maven.plugins</groupId>
         <artifactId>maven-source-plugin</artifactId>
-        <version>3.2.1</version>
+        <version>3.3.0</version>
         <executions>
           <execution>
             <id>attach-sources</id>
@@ -319,7 +319,7 @@
       <plugin>
         <groupId>org.apache.maven.plugins</groupId>
         <artifactId>maven-surefire-report-plugin</artifactId>
-        <version>3.0.0</version>
+        <version>3.1.0</version>
       </plugin>
     </plugins>
   </reporting>