add promises-es6-tests case

package.json

@@ -58,6 +58,7 @@
     "phantomjs-prebuilt": "~2.1.16",
     "playwright": "^1.17.1",
     "promises-aplus-tests": "^2.1.2",
+    "promises-es6-tests": "~0.5.0",
     "puppeteer": "~13.0.1",
     "qunit": "^2.17.2",
     "semver": "^7.3.5",
@@ -103,7 +104,9 @@
     "test-unit-pure-standalone": "run-s init bundle-helpers bundle-tests-pure test-unit-pure",
     "test-unit-karma": "run-p test-unit-global test-unit-minified test-unit-pure",
     "test-unit-node": "zx tests/node-qunit.mjs",
-    "test-promises": "promises-aplus-tests tests/promises-aplus/adapter --timeout 1000",
+    "test-promises": "run-s test-promises-aplus test-promises-es6",
+    "test-promises-aplus": "promises-aplus-tests tests/promises-aplus/adapter --timeout 1000",
+    "test-promises-es6": "promises-es6-tests tests/promises-aplus/adapter --timeout 1000",
     "test-promises-standalone": "run-s init test-promises",
     "test-observables-run": "node tests/observables/adapter && node tests/observables/adapter-pure",
     "test-observables-standalone": "run-s init test-observables",
@@ -113,9 +116,9 @@
     "test-entries-content": "zx tests/commonjs-entries-content.mjs",
     "test-entries-standalone": "run-s init test-entries",
     "test-targets-parser": "zx tests/targets-parser.mjs",
-    "test": "run-s init test-lint bundle test-unit test-promises test-observables test-entries test-targets-parser check",
+    "test": "run-s init test-lint bundle test-unit test-promises-aplus test-observables test-entries test-targets-parser check",
     "ci-karma": "run-s init bundle test-unit-karma",
-    "ci-tests": "run-s init bundle test-unit-node test-promises test-observables test-entries test-targets-parser",
+    "ci-tests": "run-s init bundle test-unit-node test-promises-aplus test-observables test-entries test-targets-parser",
     "clean-dependencies": "node scripts/clean-dependencies.mjs",
     "refresh": "npm run clean-dependencies && npm it",
     "downloads": "zx scripts/downloads-by-versions.mjs",