Feature/add Google Classroom support for v2.14.0 to resolve #85

[scrthq]

2.14.0

• Issue #85
  • Added Google Classroom support with the following functions:
    • Add-GSCourseParticipant
    • Confirm-GSCourseInvitation
    • Get-GSClassroomUserProfile
    • Get-GSCourse
    • Get-GSCourseAlias
    • Get-GSCourseInvitation
    • Get-GSCourseParticipant
    • Get-GSStudentGuardian
    • Get-GSStudentGuardianInvitation
    • New-GSCourse
    • New-GSCourseAlias
    • New-GSCourseInvitation
    • New-GSStudentGuardianInvitation
    • Remove-GSCourse
    • Remove-GSCourseAlias
    • Remove-GSCourseInvitation
    • Remove-GSCourseParticipant
    • Remove-GSStudentGuardian
    • Update-GSCourse
• Fixed: Get-GSToken Create/Expiry time split issue on macOS caused by difference in -UFormat %s (macOS doesn't have trailing milliseconds)
• Fixed: Logic in confirming if UserID is [decimal] to prevent unnecessary errors