Apply 'variable-name' tslint rule (#19743)

src/server/session.ts

@@ -124,7 +124,7 @@ namespace ts.server {
     // we want to ensure the value is maintained in the out since the file is
     // built using --preseveConstEnum.
     export type CommandNames = protocol.CommandTypes;
-    export const CommandNames = (<any>protocol).CommandTypes;
+    export const CommandNames = (<any>protocol).CommandTypes; // tslint:disable-line variable-name
 
     export function formatMessage<T extends protocol.Message>(msg: T, logger: server.Logger, byteLength: (s: string, encoding: string) => number, newLine: string): string {
         const verboseLogging = logger.hasLevel(LogLevel.verbose);