Update Ubuntu version in supported platforms
@@ -712,7 +712,7 @@ The following platforms and architectures have been tested an work correctly wit
| Operative System | Architecture | Compiler | Build Status |
| :----------------------: | :-----------------: | :-------------: | :----------------------------------------------------------------------------------------------------: |
-| **`ubuntu:xenial`** | **`amd64`** | **`gcc`** | |
+| **`ubuntu:focal`** | **`amd64`** | **`gcc`** | |
| **`debian:buster-slim`** | **`amd64`** | **`gcc:6.3.0`** | [![build](https://gitlab.com/metacall/core/badges/master/build.svg)](https://gitlab.com/metacall/core) |
| **`debian:buster-slim`** | **`amd64`** | **`gcc:8.2.0`** | |
| **`windows`** | **`x86`** **`x64`** | **`msvc`** | |
