Update to gson@2.8.9 (#390)

Author: testforstephen

com.microsoft.java.debug.core/pom.xml

@@ -47,7 +47,7 @@
         <dependency>
             <groupId>com.google.code.gson</groupId>
             <artifactId>gson</artifactId>
-            <version>2.7</version>
+            <version>2.8.9</version>
         </dependency>
         <dependency>
             <groupId>io.reactivex.rxjava2</groupId>