feat: publish files in dist-* only (smithy-lang#444)

Author: trivikr

smithy-typescript-codegen/src/main/resources/software/amazon/smithy/typescript/codegen/base-package.json

@@ -36,5 +36,6 @@
     "<4.0": {
       "dist-types/*": ["dist-types/ts3.4/*"]
     }
-  }
+  },
+  "files": ["dist-*"]
 }