mocha.opts is out of support since v8

Now it works with the dev container.

.devcontainer/Dockerfile

@@ -1,7 +1,7 @@
 FROM mcr.microsoft.com/devcontainers/typescript-node:1-20-bullseye
 
 # Install the npm packages globally
-RUN npm install -g npm \
+RUN npm install -g npm@10.7.0 \
     && npm install -g npm-check-updates
 
 COPY ./startup.sh /

.mocharc.json

@@ -0,0 +1,9 @@
+{
+    "reporter": "spec",
+    "color": true,
+    "full-trace": true,
+    "experimental-fetch": false,
+    "timeout": 200,
+    "spec": "test/**/*-test.js"
+  }
+

package.json

@@ -39,8 +39,8 @@
   },
   "main": "index.js",
   "scripts": {
-    "test": "mocha \"test/**/*.js\" --reporter spec --no-experimental-fetch --timeout 200",
-    "test-with-coverage": "nyc --reporter=text mocha \"test/**/*.js\" --reporter spec",
+    "test": "mocha",
+    "test-with-coverage": "nyc --reporter=text mocha",
     "bootstrap": "script/bootstrap",
     "prepare": "husky",
     "lint": "eslint src/ test/"