Return lein to CI

Author: tonsky

.github/workflows/build_test.yml

@@ -23,6 +23,7 @@ jobs:
         uses: DeLaGuardo/[email protected]
         with:
           cli: latest
+          lein: latest
       - run: ./script/test_clj.sh
       - run: ./script/test_cljs.sh
       - run: ./script/test_js.sh