chore: Update README.md

Author: AvraamMavridis

README.md

@@ -7,15 +7,49 @@
 [ci]:      https://travis-ci.org/AvraamMavridis/postcss-sort-alphabetically
 
 ```css
-.foo {
     /* Input example */
-}
+    a{
+        border: 1px solid black;
+        color: red;
+        background-color: red;
+    }
+    div{
+        padding: 10px;
+        margin: 20px;
+        color: red;
+        background-color: red;
+    }
+    .class {
+        flex: 1;
+        display-flex: 10px;
+    }
+    #some {
+        background-image: url('something');
+        align-items: center;
+    }
 ```
 
 ```css
-.foo {
   /* Output example */
-}
+   a{
+        background-color: red;
+        border: 1px solid black;
+        color: red;
+    }
+    div{
+        background-color: red;
+        color: red;
+        margin: 20px;
+        padding: 10px;
+    }
+    .class {
+        display-flex: 10px;
+        flex: 1;
+    }
+    #some {
+        align-items: center;
+        background-image: url('something');
+    }
 ```
 
 ## Usage