Web and native examples fail with runtime exception Not_found accessing hashtable

After f932a1cec6e633e3db14976d750d21dd9d592b0a web and native examples both seem to raise a Not_found exception:

**web:**
throws `Caml_builtin_exceptions.not_found` accessing `hotreloadData` hashtable at:
```
at Object.find (node_modules/bsb-native/lib/js/hashtbl.js:269:5)
at Object.run (node_modules/reprocessing/lib/js/src/Reprocessing.js:143:20)
at eval (lib/js/src/index.js:69:14)
at loadScript (http://localhost:8000/require_polyfill.js:146:32)
at http://localhost:8000/require_polyfill.js:149:1"
```

**native:**
```
$ OCAMLRUNPARAM=b npm run start:native

> reprocessing-example@ start:native /Users/jfriend/code/reprocessing-example
> ./lib/bs/native/index.native

Fatal error: exception Not_found
Raised at file "hashtbl.ml", line 136, characters 19-28
Called from file "/Users/jfriend/code/reprocessing-example/node_modules/reprocessing/src/Reprocess", line 119, characters 11-48
Called from file "/Users/jfriend/code/reprocessing-example/src/index.re", line 11, characters 0-22
```

Checking out 0a4739bfbbe9401b676becb96156a6afb7bdf720 and then running npm install, npm run clean and then building web or native seems to fix both issues.