old_contents: #!/usr/bin/env node
  var semver = require('semver');
  
  if (!semver.satisfies(semver(process.version), '>=5')) {
    process.exit(1);
  }
  
new_contents: #!/usr/bin/env node
  var version = parseInt(process.version.replace('v', ''));
  if (version < 5) {
    process.exit(1);
  }
  
subject: Simplify node version check