move vendored mocha, et al to package.json

Author: mockdeep

package.json

@@ -6,8 +6,14 @@
   },
   "devDependencies": {
     "@eslint/js": "^9.21.0",
+    "chai": "1.6.0",
+    "chai-backbone": "0.9.4",
+    "chai-changes": "1.3.6",
     "eslint": "^9.21.0",
     "globals": "^16.0.0",
+    "mocha": "3.5.0",
+    "sinon": "1.7.1",
+    "sinon-chai": "2.14.0",
     "stylelint": "^17.3.0",
     "stylelint-config-recess-order": "^7.6.1",
     "stylelint-config-standard": "^40.0.0",