Fix typo in readme

Also, think it is better to write `install` out in full for readmes (rather than `i`).

Author: JasoonS

README.md

@@ -7,7 +7,7 @@ Node.js bindings for ReScript
 ## Installation
 
 ```shell
-npm i add rescript-nodejs
+npm install rescript-nodejs
 ```
 or
 ```shell
@@ -64,4 +64,4 @@ We welcome and encourage anyone to contribute! In order to minimize confusion an
 
 All code is licensed as MIT. See [LICENSE](LICENSE).
 
-This project was forked from [reason-nodejs](https://github.com/sikanhe/reason-nodejs) after it was (or appeared to be) abandoned. If the original authors would like to re-engage please email me.
+This project was forked from [reason-nodejs](https://github.com/sikanhe/reason-nodejs) after it was (or appeared to be) abandoned. If the original authors would like to re-engage please email me.