set 52north repository to HTTPS (#28)

Author: cweckermann

pom.xml

@@ -11,14 +11,14 @@
         <repository>
             <id>52n-dependencies</id>
             <name>52n-dependencies</name>
-            <url>http://52north.org/maven/repo/releases</url>
+            <url>https://52north.org/maven/repo/releases</url>
         </repository>
     </repositories>
     <pluginRepositories>
         <pluginRepository>
             <id>52n-dependencies</id>
             <name>52n-dependencies</name>
-            <url>http://52north.org/maven/repo/releases</url>
+            <url>https://52north.org/maven/repo/releases</url>
         </pluginRepository>
     </pluginRepositories>
     <dependencyManagement>