Omit commiters line in markdown

[petrch87]

if I don't want to have commiters in changelog, i can provide "ignoreCommitters": [""] as an option, but there is still Committers: 0 in changelog, which is a redundant line at that point.

I would suggest:

1. adding omitCommiters: boolean to options

2. or extend the following condition

if (release.contributors) {
      markdown += `\n\n${this.renderContributorList(release.contributors)}`;
 }

to

if (release.contributors?.length) {
      markdown += `\n\n${this.renderContributorList(release.contributors)}`;
 }

[emmenko]

Option 2 would be better. Would you mind opening a PR?

[petrch87]

Sure

[petrch87]

#296