add algorithm that calculates next power of two

Bit-Manipulation/NextPowerOfTwo.js

@@ -0,0 +1,15 @@
+/**
+ *
+ *  This script will find next power of two
+ *    of given number.
+ *
+ */
+
+export const nextPowerOfTwo = (n) => {
+  let result = 1
+  while (n > 0) {
+    result = result << 1
+    n = n >> 1
+  }
+  return result
+}