Compile rescript files before running js tests

Author: Yassa-hue

.github/workflows/js_test.yml

@@ -44,5 +44,8 @@ jobs:
       - name: Build i18n libraries
         run: bundle exec rake react_on_rails:locale
 
+      - name: Compile Rescript files
+        run: yarn res:build
+
       - name: Run js tests
         run: bundle exec rake ci:js