change in commit 512231f66ba4e21462201a97fda7b37727fa83fa of var NUMBER_OF_YEARS to const not accepted by linter, so reverting it back to var
change in commit 512231f66ba4e21462201a97fda7b37727fa83fa of var NUMBER_OF_YEARS to const not accepted by linter, so reverting it back to var

stumash/CoursePlanner,stumash/CoursePlanner,stumash/CoursePlanner,stumash/CoursePlanner,stumash/CoursePlanner