TS2 is the default.

Author: domoritz

typescript-json-schema.ts

@@ -806,7 +806,7 @@ export function run() {
         .boolean("required").default("required", defaultArgs.generateRequired)
             .describe("required", "Create required array for non-optional properties.")
         .boolean("strictNullChecks").default("strictNullChecks", defaultArgs.strictNullChecks)
-            .describe("strictNullChecks", "(TypeScript 2) Make values non-nullable by default.")
+            .describe("strictNullChecks", "Make values non-nullable by default.")
         .alias("out", "o")
             .describe("out", "The output file, defaults to using stdout")
         .argv;