Add options to the scanner.scanDependencies call

Because the options parameter was not sent to scanner.scanDependencies, it failed when it tried to print a vulnerability using `log(options).warn(result.component + ' ' + result.version + ' has known vulnerabilities: ' + result.vulnerabilities.join(' '));`. Sending the options parameter fixes this issue.
Merge pull request #10 from karthik-rangarajan/master

Add options to the scanner.scanDependencies call