Suggester: upgrade chronicle-core to 2.20.20 for Java 14 support

Proposed fix for #3206

Author: stevenschlansker

suggester/pom.xml

@@ -72,7 +72,7 @@
         <dependency>
             <groupId>net.openhft</groupId>
             <artifactId>chronicle-map</artifactId>
-            <version>3.17.4</version>
+            <version>3.20.2</version>
             <exclusions>
                 <exclusion>
                     <groupId>com.sun.java</groupId>
@@ -97,6 +97,17 @@
 
     </dependencies>
 
+    <dependencyManagement>
+        <dependencies>
+            <dependency>
+                <groupId>net.openhft</groupId>
+                <artifactId>chronicle-core</artifactId>
+                <version>2.20.20</version>
+            </dependency>
+        </dependencies>
+    </dependencyManagement>
+
+
     <build>
         <plugins>
             <plugin>