Books with single chapter are incorrectly parsed, breaks output of content to html

[JMNofziger]

Seems there's a bug with the parsing/handling of single chapter books - the result I noticed is a failure to output the books contents when generating html from the source material. This affects all language translations/bible versions. You can see examples of the outcome of the parsing failures in any of the single chapter books, I've included a link to obadiah and 2 john here as examples:

• https://gratis.bible/en/rsv/obad/
• https://gratis.bible/hr/croat/2john/

The issue seems to trace back to that result returned from the xml2js parseString

In books containing more than one chapter, the dictionary for the book contains a "chapter" key with a list value. Each value within that "chapter" list structure represents one chapter of the book and is structured as a dictionary. However in the books which have only a single chapter, the "chapter" key within the book dictionary contains the chapter dictionary without the enclosing list structure. I imagine that getting your parser to enclose those chapters as expected would resolve the bug.

parser call and my debug line to log result

    if (srcExt === '.xml') {

        handled = true;
        var parse = require('xml2js').parseString;
        parse(srcFiles, options, function(err, result) {
          if (err) {
            grunt.fail.warn('File ' + f.dest.cyan + ' parsing errors: ' + err);
          }
          grunt.log.ok(JSON.stringify(result, null, 2))

Book (jude) with single chapter example of parse output:

>>         },
>>         {
>>           "type": "book",
>>           "osisID": "Jude",
>>           "chapter": {
>>             "osisID": "Jude.1",
>>             "title": "The children of your elect sister greet you.",
>>             "verse": [
>>               {
>>                 "_": "Jude, a servant of Jesus Christ and brother of James,  To those who are called, beloved in God the Father and kept for Jesus Christ:",
>>                 "osisID": "Jude.1.1"
>>               },
>>               {
>>                 ...
>>                 ...
>>                 ...

compared to a book with many chapters (revelations)

>>         },
>>         {
>>           "type": "book",
>>           "osisID": "Rev",
>>           "chapter": [
>>             {
>>               "osisID": "Rev.1",
>>               "title": "I hope to see you soon, and we will talk together face to face. [ (III John 1:15) Peace be to you. The friends greet you. Greet the friends, every one of them. ]",
>>               "verse": [
>>                 {
>>                   "_": "The revelation of Jesus Christ, which God gave him to show to his servants what must soon take place; and he made it known by sending his angel to his servant John,",
>>                   "osisID": "Rev.1.1"
>>                 },
>>                 {

[JMNofziger]

Created a quick fix for simple restructuring of the parsed object in this specific condition: 7c4ff61