CLC-4411 - Update gems: minitest-reporters

https://jira.ets.berkeley.edu/jira/browse/CLC-4411
CLC-4411 - Update gems: webmock

https://jira.ets.berkeley.edu/jira/browse/CLC-4411
Merge pull request #3097 from christianv/CLC-4411

CLC-4411 - Update gems: minitest-reporters / webmock