feat(solution): add solution handle for challenge 19

apps/testing-input-output/README.md

@@ -28,8 +28,7 @@ I created some `it` blocks but feel free to add more test if you like to.
 9. Submit a PR with a title beginning with **Answer:19** that I will review and other dev can review.
 
 <a href="https://github.com/tomalaforge/angular-challenges/pulls?q=label%3A19+label%3Aanswer"><img src="https://img.shields.io/badge/-Solutions-green" alt="input output testing"/></a>
-
-<!-- <a href='https://github.com/tomalaforge/angular-challenges/pulls?q=label%3A19+label%3A"answer+author"'><img src="https://img.shields.io/badge/-Author solution-important" alt="input output testing solution author"/></a> -->
+<a href='https://github.com/tomalaforge/angular-challenges/pulls?q=label%3A19+label%3A"answer+author"'><img src="https://img.shields.io/badge/-Author solution-important" alt="input output testing solution author"/></a>
 
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