Use Jest@26 (#9337)

.github/workflows/dev-test.yml

@@ -51,12 +51,6 @@ jobs:
       - name: Install Dependencies
         run: yarn install --frozen-lockfile
 
-      # TODO: remove this task when/if this fixed
-      # https://github.com/facebook/jest/issues/9457
-      - name: Install jest@24
-        if: matrix.ENABLE_CODE_COVERAGE
-        run: yarn upgrade jest@24
-
       - name: Run Tests (macOS)
         if: matrix.os == 'macos-latest'
         run: yarn test --maxWorkers=4