update CI and coverage

Author: rafaqz

.travis.yml

@@ -1,16 +1,21 @@
 language: julia
+
 os:
   - linux
   - osx
+  - windows
+
 julia:
   - 1.0
-  - 1.1
+  - 1.4
   - nightly
+
 matrix:
   allow_failures:
     - julia: nightly
   fast_finish: true
+
 notifications:
   email: false
-after_success:
-  - julia -e 'using Pkg; Pkg.add("Coverage"); using Coverage; Codecov.submit(process_folder())'
+
+codecov: true

README.md

@@ -1,8 +1,6 @@
 # UnicodeGraphics
 
 [![Build Status](https://travis-ci.org/rafaqz/UnicodeGraphics.jl.svg?branch=master)](https://travis-ci.org/rafaqz/UnicodeGraphics.jl)
-[![Build status](https://ci.appveyor.com/api/projects/status/9ssyr83n58nj510i?svg=true)](https://ci.appveyor.com/project/rafaqz/unicodegraphics-jl)
-[![Coverage Status](https://coveralls.io/repos/rafaqz/UnicodeGraphics.jl/badge.svg?branch=master&service=github)](https://coveralls.io/github/rafaqz/UnicodeGraphics.jl?branch=master)
 [![codecov.io](http://codecov.io/github/rafaqz/UnicodeGraphics.jl/coverage.svg?branch=master)](http://codecov.io/github/rafaqz/UnicodeGraphics.jl?branch=master)
 
 Convert a matrix of Real into a braile or block Unicode string, real fast.