The "update-contributors" step in CI/CD fails

[jginsburgn]

We get the following output:

> karma-coverage@2.0.1 update-contributors
> grunt contributors

Running "npm-contributors" task
>> Cannot commit contributors changes:
>>   Author identity unknown
>> 
>> * Please tell me who you are.
>> 
>> Run
>> 
>>   git config --global user.email "you@example.com"
>>   git config --global user.name "Your Name"
>> 
>> to set your account's default identity.
>> Omit --global to set the identity only in this repository.
>> 
>> fatal: empty ident name (for <runner@fv-az121-790.yqyg1jmbfiaufnvoyh414x3y0b.phxx.internal.cloudapp.net>) not allowed

Corresponding to https://github.com/vojtajina/grunt-npm/blob/master/tasks/npm.js#L104-L106. It appears that although the grunt task shows as failed, the contributors update in package.json takes place because the changes are committed later by semantic-release-bot.