Documentation updated

Author: Starcounter-Jack

README.md

@@ -245,13 +245,28 @@ var patch = jsonpatch.generate(observer, true);
 // ];
 ```
 
-#### `jsonpatch.unobserve(document: any, observer: Observer): void`
+#### `jsonpatch.unobserve(document, observer)`
+```
+jsonpatch.unobserve(document: any, observer: Observer): void
+
+type JsonableObj = { [key:string]: Jsonable };
+type JsonableArr = Jsonable[];
+type Jsonable = JsonableArr | JsonableObj | string | number | boolean | null;
+```
 
 Destroys the observer set up on `document`.
 
 Any remaining changes are delivered synchronously (as in `jsonpatch.generate`). Note: this is different that ES6/7 `Object.unobserve`, which delivers remaining changes asynchronously.
 
-#### `jsonpatch.compare(document1: any, document2: any, invertible = false): Operation[]`
+#### `jsonpatch.compare(document1, document2, invertible)`
+
+```
+jsonpatch.compare(document1: Jsonable, document2: Jsonable, invertible = false): Operation[]
+
+type JsonableObj = { [key:string]: Jsonable };
+type JsonableArr = Jsonable[];
+type Jsonable = JsonableArr | JsonableObj | string | number | boolean | null;
+```
 
 Compares object trees `document1` and `document2` and returns the difference relative to `document1` as a patches array.  If `invertible` is true, then each change will be preceded by a test operation of the value in `document1`.