simplify mocha config

Author: Sylvestre Gug

.mocharc.js

@@ -3,11 +3,7 @@ module.exports = {
   extension: ["js"],
   global: [],
   ignore: [],
-  jobs: 5,
   parallel: true,
-  reporter: "spec",
   require: "@babel/register",
   spec: ["test/**/*.test.js"],
-  watch: false,
-  "watch-files": ["lib/**/*.js", "test/**/*.js"],
 };