Documentation fails to build when using this theme

I pulled down this project as a zip and placed it at the root of my project. Then, based on what I could piece together from the documentation and reading between the lines, I have tried using this theme with the following Node script:
```javascript
#!/usr/bin/node

const documentation = require('documentation');
const streamArray = require('stream-array');
const vfs = require('vinyl-fs');

documentation.build(['src/**'], {})
.then(res => documentation.formats.html(res, { theme: 'documentation-theme-light-master' }))
.then(output => streamArray(output).pipe(vfs.dest('./docs')));
```

The relevant file structure is as follows:
```
node_modules/..
src/..
scripts/build-documentation.js (the above script)
documentation-theme-light-master/..
package.json
```

When I run `documentation` in this project, I receive the following error:
```
(node:18329) UnhandledPromiseRejectionWarning: Unhandled promise rejection (rejection id: 3): TypeError: require(...) is not a function
(node:18329) [DEP0018] DeprecationWarning: Unhandled promise rejections are deprecated. In the future, promise rejections that are not handled will terminate the Node.js process with a non-zero exit code.
```

The result is that the documentation fails to build and there is no output.