commits_in_branch': undefined method `map' for nil:NilClass (NoMethodError)

[aelam]

Describe the bug
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I'm not very sure if this is a bundler issue or issue of changelog-generator.
currently, I encounter this issue all the time.
Please check the screenshot

To Reproduce
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1. Go to '...'
2. Click on '....'
3. Scroll down to '....'
4. See error

Expected behavior
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Screenshots
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Desktop (please complete the following information):

• OS: Mac
• Browser [e.g. chrome, safari]
• Version changelog-generator 1.16.4

Smartphone (please complete the following information):

• Device: [e.g. iPhone6]
• OS: [e.g. iOS8.1]
• Browser [e.g. stock browser, safari]
• Version [e.g. 22]

Additional context
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