[Doc] add empty in readme.

reegeek · reegeek · commit 1b2a20f7406a · 2020-09-30T17:45:40.000+02:00
diff --git a/README.md b/README.md
@@ -174,6 +174,7 @@ Following aggregators are available:
 Following generators are available:
   - `Range`
   - `Repeat`
+  - `Empty`
 ### Quantifiers
 Following quantifiers are available:
   - `Contains`
