JS fork 🤖🤖🤖

• updated to node 18
• reduced maximum input so the expected result never exceed Number.MAX_SAFE_INTEGER resolving this issue
• used mocha/chai assertions + lodash for randomness
• made description language-agnostic
• provided input on failure

Tests in JavaScript go beyond MAX_SAFE_INTEGER:

• last test of theharder tests block:

  Test.assertEquals(solution(200000000), 9333333166666668);
  // 9333333166666668 <-- expected
  // 9007199254740991 <-- MAX_SAFE_INTEGER
  

• RNG in the random tests:

const num = ~~(Math.random() * 200000000)