fixDriveLetterCase(s) {
		if (s && process.platform === "win32" && s.match(/^[A-Z]:/g)) {
			return s.charAt(0).toLowerCase() + s.slice(1);
		}
		return s;
	}
Fix Uppercase drive letter issue on Windows. It causes problem on custom modules detection (XY instanceof Base)
Unused currently, because it causes problem: https://github.com/moleculerjs/moleculer/issues/788

More info: https://github.com/nodejs/node/issues/6978
@param {String} s
@returns {String}