Dependency update (#875)

pom.xml

@@ -76,7 +76,7 @@
         <!-- corresponding server dependency also needs updating.-->
         <groupId>io.projectreactor</groupId>
         <artifactId>reactor-bom</artifactId>
-        <version>Dysprosium-SR17</version>
+        <version>Dysprosium-SR19</version>
         <type>pom</type>
         <scope>import</scope>
       </dependency>
@@ -143,19 +143,19 @@
       <dependency>
         <groupId>com.fasterxml.jackson.core</groupId>
         <artifactId>jackson-core</artifactId>
-        <version>2.12.1</version>
+        <version>2.12.3</version>
       </dependency>
       <dependency>
         <groupId>com.fasterxml.jackson.core</groupId>
         <artifactId>jackson-databind</artifactId>
-        <version>2.12.1</version>
+        <version>2.12.3</version>
       </dependency>
 
       <!-- Graal VM -->
       <dependency>
         <groupId>org.graalvm.nativeimage</groupId>
         <artifactId>svm</artifactId>
-        <version>20.3.1</version>
+        <version>20.3.1.2</version>
         <!-- Provided scope as it is only needed for compiling the SVM substitution classes -->
         <scope>provided</scope>
       </dependency>