Order exercise folders

Ordered the exercise folders by placing their numbers in their folder name

10 fibonacci/README.md

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+# Exercise 10 - Fibonacci
+
+Create a function that returns a specific member of the Fibonacci sequence:
+
+> A series of numbers in which each number ( Fibonacci number ) is the sum of the two preceding numbers. The simplest is the series 1, 1, 2, 3, 5, 8, etc.
+
+```javascript
+fibonacci(4) // returns the 4th member of the series: 3  (1, 1, 2, 3)
+fibonacci(6) // returns 8
+```

10 fibonacci/fibonacci.js

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+const fibonacci = function() {
+
+};
+
+module.exports = fibonacci;

10 fibonacci/fibonacci.spec.js

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+const fibonacci = require('./fibonacci')
+
+describe('fibonacci', () => {
+  test('4th fibonacci number is 3', () => {
+    expect(fibonacci(4)).toBe(3);
+  });
+  test.skip('6th fibonacci number is 8', () => {
+    expect(fibonacci(6)).toBe(8);
+  });
+  test.skip('10th fibonacci number is 55', () => {
+    expect(fibonacci(10)).toBe(55);
+  });
+  test.skip('15th fibonacci number is 610', () => {
+    expect(fibonacci(15)).toBe(610);
+  });
+  test.skip('25th fibonacci number is 75025', () => {
+    expect(fibonacci(25)).toBe(75025);
+  });
+  test.skip('doesn\'t accept negatives', () => {
+    expect(fibonacci(-25)).toBe("OOPS");
+  });
+  test.skip('DOES accept strings', () => {
+    expect(fibonacci("1")).toBe(1);
+  });
+  test.skip('DOES accept strings', () => {
+    expect(fibonacci("2")).toBe(1);
+  });
+  test.skip('DOES accept strings', () => {
+    expect(fibonacci("8")).toBe(21);
+  });
+});