Update the version of the parent pom (#579)

Author: Amaury Levé

pom.xml

@@ -4,7 +4,7 @@
   <parent>
     <groupId>org.sonarsource.parent</groupId>
     <artifactId>parent</artifactId>
-    <version>45</version>
+    <version>48</version>
   </parent>
 
   <groupId>org.sonarsource.scanner.msbuild</groupId>