Add semicolon for tdd exports

test/lcm/lcm.js

@@ -3,4 +3,4 @@ const gcd = (x, y) => (!y ? x : gcd(y, x % y));
 const _lcm = (x, y) => x * y / gcd(x, y);
 return [...arr].reduce((a, b) => _lcm(a, b));
 };
-module.exports = lcm
+module.exports = lcm;