Support evaluator callbacks in the JavaScript port (#686)

Signed-off-by: Juan Cruz Viotti <jv@jviotti.com>

Author: jviotti

.github/workflows/ci.yml

@@ -142,7 +142,7 @@ jobs:
         if: matrix.platform.benchmark
 
       # Node.js
-      - run: node --test ports/javascript/test.mjs
+      - run: cd ports/javascript && npm test
       - run: node ports/javascript/benchmark.mjs > build/benchmark-javascript.json
         if: matrix.platform.benchmark