fix: make debugee variables public (#352)

Node 4 and 6 compiler now complains for these private variables were never read. These were just not used within the debug agent. However, we need to send this over to debug server via wire and these properties will be needed. Therefore, we change them to public.

src/debuggee.ts

@@ -34,10 +34,10 @@ export interface DebuggeeProperties {
 }
 
 export class Debuggee {
-  private uniquifier: string;
-  private description: string;
-  private agentVersion?: string;
-  private sourceContexts?: Array<{[key: string]: any}>;
+  uniquifier: string;
+  description: string;
+  agentVersion?: string;
+  sourceContexts?: Array<{[key: string]: any}>;
 
   // Public to allow for testing
   project: string;