some of Systemuserputpost attributes does not follow documentation and ruby standards

[MittchoBaroco]

When initiating a new Systemuserputpost object following the documentation: https://github.com/TheJumpCloud/jcapi-ruby/blob/master/jcapiv1/docs/Systemuserputpost.md,
some of the attributes does not work as advertised. (I did not test all of them)

Current behavior

JCAPIv1::Systemuserputpost.new employeeIdentifier: '12343', employeeType: "student"
=> #<JCAPIv1::Systemuserputpost:0x00007fd7237d7628 @employee_identifier="12343", @employee_type="student">

Expected behavior

JCAPIv1::Systemuserputpost.new employee_identifier: '12343', employee_type: "student'
=> #<JCAPIv1::Systemuserputpost:0x00007fd726baaf18 @employee_identifier="12343" @employee_type="student">

[MittchoBaroco]

After testing all the one listed on the doc the following are having issues:
@cost_center is declared using costCenter
@employee_identifier is declared using employeeIdentifier
@employee_type is declared using employeeType
@job_title is declared using jobTitle
@phone_numbers is declared using phoneNumbers