bump inherits dep

I keep getting the following error message:

```bash
npm WARN unmet dependency /usr/local/lib/node_modules/npm/node_modules/fstream-npm/node_modules/fstream-ignore requires inherits@'~1.0.0' but will load
npm WARN unmet dependency /usr/local/lib/node_modules/npm/node_modules/fstream-npm/node_modules/inherits,
npm WARN unmet dependency which is version 2.0.0
```