fix: pom.xml to reduce vulnerabilities

The following vulnerabilities are fixed with an upgrade:
- https://snyk.io/vuln/SNYK-JAVA-COMFASTERXMLJACKSONCORE-6056407

pom.xml

@@ -66,7 +66,7 @@
         <dependency>
             <groupId>org.json4s</groupId>
             <artifactId>json4s-jackson_2.11</artifactId>
-            <version>3.5.0</version>
+            <version>3.6.8</version>
         </dependency>
         <dependency>
             <groupId>org.scalatra</groupId>
@@ -291,7 +291,7 @@
         <dependency>
             <groupId>com.amazonaws</groupId>
             <artifactId>aws-java-sdk-s3</artifactId>
-            <version>1.11.257</version>
+            <version>1.12.588</version>
         </dependency>
         <dependency>
             <groupId>fi.vm.sade</groupId>
@@ -446,12 +446,10 @@
                                 </filter>
                             </filters>
                             <transformers>
-                                <transformer
-                                    implementation="org.apache.maven.plugins.shade.resource.AppendingTransformer">
+                                <transformer implementation="org.apache.maven.plugins.shade.resource.AppendingTransformer">
                                     <resource>reference.conf</resource>
                                 </transformer>
-                                <transformer
-                                    implementation="org.apache.maven.plugins.shade.resource.ManifestResourceTransformer">
+                                <transformer implementation="org.apache.maven.plugins.shade.resource.ManifestResourceTransformer">
                                     <manifestEntries>
                                         <Main-Class>fi.vm.sade.omatsivut.OmatsivutServer</Main-Class>
                                     </manifestEntries>
@@ -588,11 +586,11 @@
                         <executions>
                             <execution>
                                 <id>scala-compile-first</id>
-                                <phase />
+                                <phase/>
                             </execution>
                             <execution>
                                 <id>scala-test-compile</id>
-                                <phase />
+                                <phase/>
                             </execution>
                         </executions>
                     </plugin>
@@ -602,7 +600,7 @@
                         <version>2.4.3</version>
                         <executions>
                             <execution>
-                                <phase />
+                                <phase/>
                             </execution>
                         </executions>
                     </plugin>
@@ -612,7 +610,7 @@
                         <executions>
                             <execution>
                                 <id>get-vts-var</id>
-                                <phase />
+                                <phase/>
                             </execution>
                         </executions>
                     </plugin>