Fix/code smells (#1338)

* ♻️ refactor: improving and fixing some code

* Updated Documentation in README.md

* ♻️ refactor: improving isLeapYear

* 🐛 chore: back changes

* 🐛 fix: using reduce instead forEach

* 🐛 fix: using reduce instead forEach

* 🐛 fix: removing duplicated code

* 🐛 chore: removing .js

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Co-authored-by: github-actions <${GITHUB_ACTOR}@users.noreply.github.com>

Maths/LeapYear.js

@@ -14,9 +14,5 @@
  * @returns {boolean} true if this is a leap year, false otherwise.
  */
 export const isLeapYear = (year) => {
-  if (year % 400 === 0) return true
-  if (year % 100 === 0) return false
-  if (year % 4 === 0) return true
-
-  return false
+  return ((year % 400) === 0) || (((year % 100) !== 0) && ((year % 4) === 0))
 }