many-pairs rendering

[crixlet]

I realize this may no longer be maintained, but wanted to post in case someone may have run across this.

I'm trying to render to multiple templates based on a json from the example

[{
    "year": 2014, 
    "title": "Mansfield Park", 
    "slug": "mansfield-park"

}, {
    "year": 2012, 
    "title": "Oblomow", 
    "slug": "oblomow"
}, {
    "year": 2012, 
    "title": "Fathers and Sons", 
    "slug": "fathers-and-sons"
}]

and my command render test.handlebars \ --context test1.json --output {value.slug} --many-pairs --verbose

returns the error Rendering a collection requires an output filename template with placeholders, to avoid rendering each context set to the same file.

I've also been unable to get the --many to render from an array, get the following error:

/usr/local/lib/node_modules/render-cli/lib/index.js:74
      contexts.forEach(function(context) {
               ^

TypeError: Cannot read property 'forEach' of undefined

Which may be potentially unrelated?