Feature request: Support for importing built-in helpers from handlerbars.java

[vjda]

It would be great to have a way to import automatically the built-in helpers from the dependency handlebars.java in order to reuse them in the templates to render the changelog text.

Currently, if we try to use one of the helpers available in handlebars.java we get an exception. For instance, for a template similar to this:

{{#commits}}
    {{#ifCommitBreaking .}}
- **{{capitalizeFirst messageTitle}}** ([{{hash}}]({{gitLabProjectUrl}}/commit/{{hashFull}}))
    {{/ifCommitBreaking}}
{{/commits}}

git-changelog-command-line throws the following error:

Exception in thread "main" com.github.jknack.handlebars.HandlebarsException: inline@64a82ec9:16:6: could not find helper: 'capitalizeFirst'
- **{{capitalizeFirst messageTitle}}** ([{{hash}}]({{gitLabProjectUrl}}/commit/{{hashFull}}))
      ^

Notice that capitalizeFirst comes from StringHelpers.java.

I've been diving into the git-changelog-lib code for some time but I'm not very familiar with it, so I can't really estimate how much effort it would take to do the functionality. But let me know if I can help at all.

Thanks in advance.

[tomasbjerre]

StringHelpers is now included.

[vjda]

awesome! thanks @tomasbjerre !