addTypename flag should be false by default (#680)

By following documentation --addTypename argument should be set to false by default

Author: milosdanilov

packages/apollo-language-server/src/config.ts

@@ -83,7 +83,7 @@ export const DefaultClientConfig = {
   tagName: "gql",
   clientOnlyDirectives: ["connection", "type"],
   clientSchemaDirectives: ["client", "rest"],
-  addTypename: true,
+  addTypename: false,
   statsWindow: DefaultEngineStatsWindow
 };
 

packages/apollo/src/commands/client/codegen.ts

@@ -50,7 +50,7 @@ export default class Generate extends ClientCommand {
     }),
     addTypename: flags.boolean({
       description: "Automatically add __typename to your queries",
-      default: true
+      default: false
     }),
     passthroughCustomScalars: flags.boolean({
       description: "Use your own types for custom scalars"