update PR

10_fibonacci/fibonacci.js

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+const fibonacci = function() {
+
+};
+
+// Do not edit below this line
+module.exports = fibonacci;

10_fibonacci/solution/fibonacci-solution.spec.js

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