corrections

README.md

@@ -33,7 +33,7 @@ Tested with:
 * Python 2 and Python 3
 * TF 1.3, 1.10 and 1.12 (commit <= 97c2512)
 * TF 1.14, 1.15, 2.3.1 (commit >= ec00c1a)
-* Ubuntu 16.04, 19.04 and Windows 7, 10
+* Ubuntu 16.04, 18.04 and Windows 7, 10
 
 
 ## Command line arguments