chore: Update readme

Author: last-partizan

README.rst

@@ -18,16 +18,15 @@ Django-MongoEngine
 
 THIS IS UNSTABLE PROJECT, IF YOU WANT TO USE IT - FIX WHAT YOU NEED
 
-Right now we're targeting to get things working on Django 2.0;
-3.0 support added, but not tested in production.
+Right now we're targeting to get things working on Django 2.0 and 3.0;
 
 WARNING:
 --------
 Maybe there is better option for mongo support, take a look at https://nesdis.github.io/djongo/;
 It's python3 only and i have not tried it yet, but looks promising.
 
 
-Working / Django 2.0
+Working / Django 2.0-3.0
 ---------------------
 
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