fix: use default value for null options

Author: pvdlg

lib/verify-config.js

@@ -1,4 +1,4 @@
-const {isString, isUndefined, isBoolean} = require('lodash');
+const {isString, isNil, isBoolean} = require('lodash');
 const getError = require('./get-error');
 
 const isNonEmptyString = value => isString(value) && value.trim();
@@ -12,7 +12,7 @@ const VALIDATORS = {
 module.exports = ({npmPublish, tarballDir, pkgRoot}) => {
   const errors = Object.entries({npmPublish, tarballDir, pkgRoot}).reduce(
     (errors, [option, value]) =>
-      !isUndefined(value) && value !== false && !VALIDATORS[option](value)
+      !isNil(value) && !VALIDATORS[option](value)
         ? [...errors, getError(`EINVALID${option.toUpperCase()}`, {[option]: value})]
         : errors,
     []