Build on Windows CI, update badges (#86)

* Build on Windows CI, update badges

* Use more stable GHC-8.8.3 on AppVeyor

README.md

@@ -1,11 +1,15 @@
 # typerep-map
 
-![electricity](https://user-images.githubusercontent.com/8126674/44323413-788dd700-a484-11e8-842e-f224cfaa4206.png)
+![logo](https://user-images.githubusercontent.com/8126674/44323413-788dd700-a484-11e8-842e-f224cfaa4206.png)
+
+[![GitHub CI](https://github.com/kowainik/typerep-map/workflows/CI/badge.svg)](https://github.com/kowainik/typerep-map/actions)
 [![Build status](https://img.shields.io/travis/kowainik/typerep-map.svg?logo=travis)](https://travis-ci.org/kowainik/typerep-map)
+[![Windows build status](https://ci.appveyor.com/api/projects/status/github/kowainik/typerep-map?branch=master&svg=true)](https://ci.appveyor.com/project/kowainik/typerep-map)
 [![Hackage](https://img.shields.io/hackage/v/typerep-map.svg?logo=haskell)](https://hackage.haskell.org/package/typerep-map)
 [![Stackage LTS](http://stackage.org/package/typerep-map/badge/lts)](http://stackage.org/lts/package/typerep-map)
 [![Stackage Nightly](http://stackage.org/package/typerep-map/badge/nightly)](http://stackage.org/nightly/package/typerep-map)
-[![MIT license](https://img.shields.io/badge/license-MIT-blue.svg)](https://github.com/vrom911/typerep-map/blob/master/LICENSE)
+[![MPL-2.0 license](https://img.shields.io/badge/license-MPL--2.0-blue.svg)](LICENSE)
+
 
 `typerep-map` introduces `TMap` and `TypeRepMap` — data structures like [`Map`](http://hackage.haskell.org/package/containers-0.6.0.1/docs/Data-Map-Lazy.html#t:Map), but where types serve as keys, and values have the types specified in the corresponding key spots.
 

appveyor.yml

@@ -0,0 +1,35 @@
+clone_folder: "c:\\WORK"
+clone_depth: 5
+
+# Do not build feature branch with open Pull Requests
+skip_branch_with_pr: true
+
+platform:
+  - x86
+  - x86_64
+
+cache:
+  - "C:\\SR"
+  - dist-newstyle
+
+environment:
+  global:
+    CABOPTS: --store-dir=C:\\SR
+
+  matrix:
+    - GHCVER: 8.8.3
+
+install:
+  - choco source add -n mistuke -s https://www.myget.org/F/mistuke/api/v2
+  - choco install -y cabal --version 3.0.0.0
+  - choco install -y ghc   --version 8.8.3
+  - refreshenv
+
+before_build:
+  - cabal --version
+  - ghc   --version
+  - cabal %CABOPTS% update
+
+build_script:
+  - cabal %CABOPTS% build --enable-tests --write-ghc-environment-files=always
+  - cabal %CABOPTS% test  --enable-tests