eslint: in the upcoming JavaScript code, skip unneeded semicolons

I am about to add some JavaScript code, where semicolons are frequently
unneeded. Let's skip them there.

Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>

Author: dscho

eslint.config.mjs

@@ -127,6 +127,18 @@ export default tseslint.config(
       "security/detect-object-injection": "off",
     },
   },
+  {
+    files: ["**/*.js", "**/*.mjs"],
+    rules: {
+      "@stylistic/semi": ["error", "never"],
+      "prettier/prettier": [
+        "warn",
+        {
+          semi: false,
+        },
+      ],
+    },
+  },
   {
     files: ["tests/*.ts", "lib/*.ts", "script/*.ts"],
     extends: [...tseslint.configs.recommendedTypeChecked],