* feat: migrate enzyme to edx/react-unit-test-utils * refactor: remove shallowWrapper usage * refactor: remove unnecessary _instance usage
* chore: renderer test coverage * fix: lint * chore: api tests * chore: tests for app reducer and StartGradeButton * chore: lint * fix: update reducer tests * chore: more test coverage * chore: test coverage * chore: update test for merge conflicts