code: function getUnsatisfiedDeps(deps, versions, options) {
  	const ownDependencies = getOwnDependencies(options);
  
  	return deps.filter(dep => {
  		const required = versions[dep];
  
  		if (required && !semver.validRange(required)) {
  			throw new MrmError(
  				`Invalid npm version: ${required}. Use proper semver range syntax.`
  			);
  		}
  
  		const installed = getInstalledVersion(dep);
  
  		// Package isn’t installed yet
  		if (!installed) {
  			return true;
  		}
  
  		// Module is installed but not in package.json dependencies
  		if (!ownDependencies[dep]) {
  			return true;
  		}
  
  		// No required version specified
  		if (!required) {
  			// Install if the pacakge isn’t installed
  			return !installed;
  		}
  
  		// Install if installed version doesn't satisfy range
  		return !semver.satisfies(installed, required);
  	});
  }
docs: Return only not installed dependencies, or dependencies which installed
  version doesn't satisfy range.
  
  @param {string[]} deps
  @param {object} [versions]
  @return {string[]}