[MEJB-131] Upgrade Maven to 3.2.5

Set proper scopes for maven bits and update dependencies.

This closes #16
diff --git a/pom.xml b/pom.xml
index d9132a9..69dc418 100644
--- a/pom.xml
+++ b/pom.xml
@@ -26,7 +26,7 @@
     <groupId>org.apache.maven.plugins</groupId>
     <artifactId>maven-plugins</artifactId>
     <version>34</version>
-    <relativePath>../../pom/maven/maven-plugins/pom.xml</relativePath>
+    <relativePath/>
   </parent>
 
   <artifactId>maven-ejb-plugin</artifactId>
@@ -62,10 +62,9 @@
   </distributionManagement>
 
   <properties>
-    <mavenArchiverVersion>3.5.0</mavenArchiverVersion>
-    <mavenFilteringVersion>3.1.1</mavenFilteringVersion>
-    <mavenVersion>3.1.1</mavenVersion>
+    <mavenVersion>3.2.5</mavenVersion>
     <javaVersion>7</javaVersion>
+    <mavenPluginToolsVersion>3.6.4</mavenPluginToolsVersion>
     <project.build.outputTimestamp>2020-06-07T16:20:17Z</project.build.outputTimestamp>
   </properties>
 
@@ -74,21 +73,36 @@
       <groupId>org.apache.maven</groupId>
       <artifactId>maven-plugin-api</artifactId>
       <version>${mavenVersion}</version>
+      <scope>provided</scope>
     </dependency>
     <dependency>
       <groupId>org.apache.maven</groupId>
       <artifactId>maven-core</artifactId>
       <version>${mavenVersion}</version>
+      <scope>provided</scope>
     </dependency>
     <dependency>
       <groupId>org.apache.maven</groupId>
       <artifactId>maven-artifact</artifactId>
       <version>${mavenVersion}</version>
+      <scope>provided</scope>
+    </dependency>
+    <dependency>
+      <groupId>org.apache.maven</groupId>
+      <artifactId>maven-model</artifactId>
+      <version>${mavenVersion}</version>
+      <scope>provided</scope>
+    </dependency>
+    <dependency>
+      <groupId>org.apache.maven</groupId>
+      <artifactId>maven-settings</artifactId>
+      <version>${mavenVersion}</version>
+      <scope>provided</scope>
     </dependency>
     <dependency>
       <groupId>org.apache.maven</groupId>
       <artifactId>maven-archiver</artifactId>
-      <version>${mavenArchiverVersion}</version>
+      <version>3.5.2</version>
     </dependency>
     <dependency>
       <groupId>org.apache.maven.plugin-tools</groupId>
@@ -98,22 +112,22 @@
     <dependency>
       <groupId>org.apache.maven.shared</groupId>
       <artifactId>maven-filtering</artifactId>
-      <version>${mavenFilteringVersion}</version>
+      <version>3.2.0</version>
+    </dependency>
+    <dependency>
+      <groupId>org.apache.maven.shared</groupId>
+      <artifactId>maven-shared-utils</artifactId>
+      <version>3.3.4</version>
     </dependency>
     <dependency>
       <groupId>org.codehaus.plexus</groupId>
       <artifactId>plexus-utils</artifactId>
-      <version>3.3.0</version>
+      <version>3.3.1</version>
     </dependency>
     <dependency>
       <groupId>org.codehaus.plexus</groupId>
       <artifactId>plexus-archiver</artifactId>
-      <version>4.2.3</version>
-    </dependency>
-    <dependency>
-      <groupId>org.codehaus.plexus</groupId>
-      <artifactId>plexus-interpolation</artifactId>
-      <version>1.26</version>
+      <version>4.2.7</version>
     </dependency>
     <dependency>
       <groupId>commons-io</groupId>
@@ -123,7 +137,7 @@
     <dependency>
       <groupId>junit</groupId>
       <artifactId>junit</artifactId>
-      <version>4.13.1</version>
+      <version>4.13.2</version>
       <scope>test</scope>
     </dependency>
     <dependency>
@@ -135,7 +149,7 @@
     <dependency>
       <groupId>org.apache.maven.plugin-testing</groupId>
       <artifactId>maven-plugin-testing-harness</artifactId>
-      <version>3.0.0</version>
+      <version>3.3.0</version>
       <scope>test</scope>
     </dependency>
   </dependencies>