update badges

Author: Mego

README.md

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-# Actually [![Build Status](https://travis-ci.org/Mego/Seriously.svg?branch=master)](https://travis-ci.org/Mego/Seriously) [![Build status](https://ci.appveyor.com/api/projects/status/v2w8ek1dypxb36s9?svg=true)](https://ci.appveyor.com/project/Mego/seriously) [![PyPI](https://img.shields.io/pypi/v/seriously.svg?maxAge=2592000?style=plastic)](https://pypi.python.org/pypi/seriously) [![license](https://img.shields.io/github/license/Mego/Seriously.svg?maxAge=2592000?style=plastic)](LICENSE) [![codecov](https://codecov.io/gh/Mego/Seriously/branch/master/graph/badge.svg)](https://codecov.io/gh/Mego/Seriously) [![CII Best Practices](https://bestpractices.coreinfrastructure.org/projects/1173/badge)](https://bestpractices.coreinfrastructure.org/projects/1173)
+# Actually [![Test](https://github.com/Mego/Seriously/actions/workflows/test.yml/badge.svg)](https://github.com/Mego/Seriously/actions/workflows/test.yml) [![PyPI](https://img.shields.io/pypi/v/seriously.svg?maxAge=2592000?style=plastic)](https://pypi.python.org/pypi/seriously) [![license](https://img.shields.io/github/license/Mego/Seriously.svg?maxAge=2592000?style=plastic)](LICENSE) [![codecov](https://codecov.io/gh/Mego/Seriously/branch/master/graph/badge.svg)](https://codecov.io/gh/Mego/Seriously) [![CII Best Practices](https://bestpractices.coreinfrastructure.org/projects/1173/badge)](https://bestpractices.coreinfrastructure.org/projects/1173)
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 A golfing language that is probably terrible. It is currently being developed. Actually is the spiritual successor to Seriously. Actually is stack-based, and is unique in its amount of single-character commands. Every character whose ordinal is in [0,255] does something (or will, once I finish development).
 
 All strings are valid programs. There is no such thing as a syntax error, and anything that appears to be a runtime error is actually a no-op (NOP). If you call a command that expects a string on top of the stack, but the top value is an integer, instead of throwing an error, it silently performs a NOP. Eventually, this will not be seen, as the goal for Seriously is for every character and stack state to map to a command.