Upgrading from 14.1.0 to 14.2.0 json no longer parsed

this used to parse fine and make it through recast

```
const x =
{"foo":"💃"}
```

upgrading to 14.2.0 causes:

```
console.error bin/main.js:134
Error processing x/bar.json
console.error bin/main.js:135
Cannot find module 'esprima' from 'utils.js'
```

Start with utils.js and the error path reported at bin/main.js:134-135, then compare JSON handling between recast 14.1.0 and 14.2.0. Reproduce the const x example and verify that the JSON is parsed and processed without the missing esprima error.

Written by the indexing model from the issue text.