Enable CodeCov (#3)

- Add CodeCov to AppVeyor config

- Add badge to README

Author: SeeminglyScience

README.md

@@ -7,9 +7,9 @@ By participating, you are expected to uphold this code. Please report unacceptab
 
 ## Build Status
 
-|AppVeyor (Windows)|CircleCI (Linux)|
-|---|---|
-|[![Build status](https://ci.appveyor.com/api/projects/status/enn6rrrq3ds5ebhr/branch/master?svg=true)](https://ci.appveyor.com/project/SeeminglyScience/classexplorer/branch/master)|[![CircleCI](https://circleci.com/gh/SeeminglyScience/ClassExplorer.svg?style=svg)](https://circleci.com/gh/SeeminglyScience/ClassExplorer)|
+|AppVeyor (Windows)|CircleCI (Linux)|CodeCov|
+|---|---|---|
+|[![Build status](https://ci.appveyor.com/api/projects/status/enn6rrrq3ds5ebhr/branch/master?svg=true)](https://ci.appveyor.com/project/SeeminglyScience/classexplorer/branch/master)|[![CircleCI](https://circleci.com/gh/SeeminglyScience/ClassExplorer.svg?style=svg)](https://circleci.com/gh/SeeminglyScience/ClassExplorer)|[![codecov](https://codecov.io/gh/SeeminglyScience/ClassExplorer/branch/master/graph/badge.svg)](https://codecov.io/gh/SeeminglyScience/ClassExplorer)|
 
 ## Features
 

appveyor.yml

@@ -12,6 +12,8 @@ install:
     Install-Module InvokeBuild -RequiredVersion 3.2.1 -Scope CurrentUser -Force
 
     Install-Module platyPS -RequiredVersion 0.8.1 -Scope CurrentUser -Force
+
+    choco install codecov --no-progress
 build_script:
 - ps: >-
     Invoke-Build -Task Prerelease -Configuration Release -GenerateCodeCoverage
@@ -23,6 +25,7 @@ build_script:
 
     if ($passed) {
         [System.Net.WebClient]::new().UploadFile("https://ci.appveyor.com/api/testresults/nunit/${env:APPVEYOR_JOB_ID}", $resultsFile)
+        codecov -f "$PWD\testresults\opencover.xml"
     } else {
         $Error | Format-List * -Force
         exit 1;