updated dependencies

Author: hauner

pom.xml

@@ -38,7 +38,7 @@
     </scm>
 
     <prerequisites>
-        <maven>3.6.0</maven>
+        <maven>3.8.4</maven>
     </prerequisites>
 
     <properties>
@@ -62,27 +62,27 @@
             <!-- plugin interfaces and base classes -->
             <groupId>org.apache.maven</groupId>
             <artifactId>maven-plugin-api</artifactId>
-            <version>3.6.3</version>
+            <version>3.8.1</version>
             <scope>provided</scope>
         </dependency>
         <dependency>
             <!-- needed when injecting the Maven Project into a plugin  -->
             <groupId>org.apache.maven</groupId>
             <artifactId>maven-core</artifactId>
-            <version>3.6.0</version>
+            <version>3.8.1</version>
             <scope>provided</scope>
         </dependency>
         <dependency>
             <!-- annotations used to describe the plugin meta-data -->
             <groupId>org.apache.maven.plugin-tools</groupId>
             <artifactId>maven-plugin-annotations</artifactId>
-            <version>3.6.0</version>
+            <version>3.6.2</version>
             <scope>provided</scope>
         </dependency>
         <dependency>
             <groupId>org.apache.maven.shared</groupId>
             <artifactId>maven-shared-utils</artifactId>
-            <version>3.2.1</version>
+            <version>3.3.4</version>
         </dependency>
         <dependency>
             <groupId>io.openapiprocessor</groupId>
@@ -101,7 +101,7 @@
             <plugin>
               <groupId>org.apache.maven.plugins</groupId>
               <artifactId>maven-deploy-plugin</artifactId>
-              <version>3.0.0-M1</version>
+              <version>3.0.0-M2</version>
             </plugin>
             <plugin>
                 <groupId>org.apache.maven.plugins</groupId>
@@ -135,7 +135,7 @@
             <plugin>
                 <groupId>org.simplify4u.plugins</groupId>
                 <artifactId>sign-maven-plugin</artifactId>
-                <version>0.3.0</version>
+                <version>1.0.0</version>
                 <executions>
                     <execution>
                         <goals>