Update a few Maven plugin versions

pom.xml

@@ -124,9 +124,9 @@
 
         <gephi.maven-clean-plugin.version>2.5</gephi.maven-clean-plugin.version>
 
-        <gephi.maven-compiler-plugin.version>3.0</gephi.maven-compiler-plugin.version>
+        <gephi.maven-compiler-plugin.version>3.1</gephi.maven-compiler-plugin.version>
 
-        <gephi.maven-dependency-plugin.version>2.6</gephi.maven-dependency-plugin.version>
+        <gephi.maven-dependency-plugin.version>2.8</gephi.maven-dependency-plugin.version>
 
         <gephi.maven-deploy-plugin.version>2.7</gephi.maven-deploy-plugin.version>
 
@@ -140,7 +140,7 @@
 
         <gephi.maven-jarsigner-plugin.version>1.2</gephi.maven-jarsigner-plugin.version>
 
-        <gephi.maven-javadoc-plugin.version>2.9</gephi.maven-javadoc-plugin.version> 
+        <gephi.maven-javadoc-plugin.version>2.9.1</gephi.maven-javadoc-plugin.version> 
 
         <gephi.maven-license-plugin.version>1.9.0</gephi.maven-license-plugin.version>
 
@@ -152,11 +152,11 @@
 
         <gephi.maven-source-plugin.version>2.2.1</gephi.maven-source-plugin.version>
 
-        <gephi.maven-surefire-plugin.version>2.13</gephi.maven-surefire-plugin.version>
+        <gephi.maven-surefire-plugin.version>2.16</gephi.maven-surefire-plugin.version>
 
-        <gephi.build-helper-maven-plugin.version>1.7</gephi.build-helper-maven-plugin.version>
+        <gephi.build-helper-maven-plugin.version>1.8</gephi.build-helper-maven-plugin.version>
 
-        <gephi.nbm-maven-plugin.version>3.9</gephi.nbm-maven-plugin.version>
+        <gephi.nbm-maven-plugin.version>3.10.1</gephi.nbm-maven-plugin.version>
         
         <gephi.maven-reactor-plugin.version>1.0</gephi.maven-reactor-plugin.version>