Added information on array paths

Author: AsyncBanana

README.md

@@ -49,7 +49,10 @@ If you are using CommonJS, you can import it like this:
 const diff = require("microdiff").default;
 ```
 
-There are three different types of changes. `CREATE`, `REMOVE`, and `CHANGE`. The `path` property gives a path to the property in the new object (or the old object in the case of `REMOVE`). Each element in the array is a key to the next property a level deeper until you get to the property changed. The `value` property exists in types `CREATE` and `CHANGE`, and it contains the value of the property added/changed.
+There are three different types of changes. `CREATE`, `REMOVE`, and `CHANGE`.
+The `path` property gives a path to the property in the new object (or the old object in the case of `REMOVE`).
+Each element in the paths is a key to the next property a level deeper until you get to the property changed, and it is string or a number, depending on whether the object is an Array or Object (Objects with number keys will still be strings).
+The `value` property exists in types `CREATE` and `CHANGE`, and it contains the value of the property added/changed.
 
 # Benchmarks