Merge pull request #38 from rylev/readme-section-test

Add section on node dependency in README

Author: alexcrichton

README.md

@@ -439,3 +439,8 @@ at your option.
 Unless you explicitly state otherwise, any contribution intentionally submitted
 for inclusion in this project by you, as defined in the Apache-2.0 license,
 shall be dual licensed as above, without any additional terms or conditions.
+
+### Tests
+
+In order to run the tests you will need (node.js)[https://nodejs.org/] version
+8.9.4 or above. Running the tests is done by running `cargo test`.