upgraded gpg plugin

Author: lpandzic

pom.xml

@@ -58,7 +58,7 @@
 		<maven-compiler-plugin.version>3.8.1</maven-compiler-plugin.version>
 		<coveralls-maven-plugin.version>4.3.0</coveralls-maven-plugin.version>
 		<jacoco-maven-plugin.version>0.8.8</jacoco-maven-plugin.version>
-		<maven-gpg-plugin.version>3.0.1</maven-gpg-plugin.version>
+		<maven-gpg-plugin.version>3.1.0</maven-gpg-plugin.version>
 		<maven-javadoc-plugin.version>3.3.0</maven-javadoc-plugin.version>
 		<maven-surefire-plugin.version>3.0.0-M7</maven-surefire-plugin.version>
 		<maven-failsafe-plugin.version>3.0.0-M7</maven-failsafe-plugin.version>