This is not so much because extractor output has changed (it hasn't, except for corner cases) but to disable trap caching so as to help us to flush out bugs.
We now use module auto-detection and no TypeScript mode.
This only affects extern extraction in `AutoBuild`, everything else sets these options explicitly.
We currently do not have any ES2015 modules or TypeScript code in our externs, so in practice this is behaviour-preserving.