Merge branch 'master' of https://gitlab.cs.ui.ac.id/pmpl/class-project/kape into 1606889591-238

core/lib/validators.py

core/migrations/0001_initial.py

core/migrations/0002_student_ielts.py

core/migrations/0003_company_founded.py

core/migrations/0004_auto_20191206_1510.py

core/migrations/0005_auto_20191206_1634.py

core/models/accounts.py

core/tests/test_accounts.py