CLI error if non-standard syntax encountered

Testing automatic installation in one of my project resulted into failure when touching `nuxt.config.ts`

```
Error updating 'nuxt.config.ts':
Casting "ConditionalExpression" is not supported

137 | alias: {
138 | // https://stackoverflow.com/a/50449379/3204544
139 | inferno: (process.env.NODE_ENV !== 'production') ? 'inferno/dist/index.dev.esm.js' : 'inferno/dist/index.esm.js',
^
140 | },
141 | },
142 | },
```

Looks like a limitation of `magicast` in `elrh-cosca` library. And adds up another argument for better AST solution - https://github.com/AloisSeckar/elrh-cosca/issues/1