Remove AppVeyor badge and workflow (nonstd-lite issue 79) [ci skip]

Author: martinmoene

README.md

@@ -2,7 +2,7 @@
 
 **Note**: You may want to consider using [*indirect\_value lite (p1950)*](https://github.com/martinmoene/indirect-value-lite) instead of *value\_ptr lite*.
 
-[![Language](https://img.shields.io/badge/C%2B%2B-98/11/14/17-blue.svg)](https://en.wikipedia.org/wiki/C%2B%2B#Standardization) [![License](https://img.shields.io/badge/license-BSL-blue.svg)](https://opensource.org/licenses/BSL-1.0) [![Build Status](https://github.com/martinmoene/value-ptr-lite/actions/workflows/ci.yml/badge.svg)](https://github.com/martinmoene/value-ptr-lite/actions/workflows/ci.yml) [![Build status](https://ci.appveyor.com/api/projects/status/w2dgn3fxyrd6vcq8?svg=true)](https://ci.appveyor.com/project/martinmoene/value-ptr-lite) [![Version](https://badge.fury.io/gh/martinmoene%2Fvalue-ptr-lite.svg)](https://github.com/martinmoene/value-ptr-lite/releases) [![download](https://img.shields.io/badge/latest-download-blue.svg)](https://raw.githubusercontent.com/martinmoene/value-ptr-lite/master/include/nonstd/value_ptr.hpp) [![Conan](https://img.shields.io/badge/on-conan-blue.svg)](https://bintray.com/martinmoene/nonstd-lite/value-ptr-lite%3Anonstd-lite/_latestVersion) [![Vcpkg](https://img.shields.io/badge/on-vcpkg-blue.svg)](https://vcpkg.link/ports/value-ptr-lite) [![Try it on godbolt online](https://img.shields.io/badge/on-godbolt-blue.svg)](https://godbolt.org/z/cjdGue)
+[![Language](https://img.shields.io/badge/C%2B%2B-98/11/14/17-blue.svg)](https://en.wikipedia.org/wiki/C%2B%2B#Standardization) [![License](https://img.shields.io/badge/license-BSL-blue.svg)](https://opensource.org/licenses/BSL-1.0) [![Build Status](https://github.com/martinmoene/value-ptr-lite/actions/workflows/ci.yml/badge.svg)](https://github.com/martinmoene/value-ptr-lite/actions/workflows/ci.yml) [![Version](https://badge.fury.io/gh/martinmoene%2Fvalue-ptr-lite.svg)](https://github.com/martinmoene/value-ptr-lite/releases) [![download](https://img.shields.io/badge/latest-download-blue.svg)](https://raw.githubusercontent.com/martinmoene/value-ptr-lite/master/include/nonstd/value_ptr.hpp) [![Conan](https://img.shields.io/badge/on-conan-blue.svg)](https://bintray.com/martinmoene/nonstd-lite/value-ptr-lite%3Anonstd-lite/_latestVersion) [![Vcpkg](https://img.shields.io/badge/on-vcpkg-blue.svg)](https://vcpkg.link/ports/value-ptr-lite) [![Try it on godbolt online](https://img.shields.io/badge/on-godbolt-blue.svg)](https://godbolt.org/z/cjdGue)
 
 
 **Contents**