Updated tests

- Added tests for `str`
- Added tests for `pick`

types/dot-object/dot-object-tests.ts

@@ -47,12 +47,21 @@ var newObj = {
     nested: {
       value: 'Hi there!'
     }
+  },
+  breath: {
+    value: 'Hello'
   }
 };
 
 var val = dot.pick('some.nested.value', newObj);
 console.log(val);
 
+// Set a new value
+val = dot.str('breath.value', 'World', newObj);
+
+// Replacing with a new object
+val = dot.set('breath', { value: 'Goodbye' }, newObj);
+
 // Pick & Remove the value
 val = dot.pick('some.nested.value', newObj, true);