Custom module library not detected
Most likely your version regex ist wrong. According to the source code, the version string looks like this:

crossfilter.version = "1.3.7";


The regex pattern needs to account for the whitespace around the equal-sign. I'd probably write it like this

'pattern' =&gt; '/crossfilter\.version\s*=\s*"(\d+\.\d+\.\d+)"/',