fix: resolve codecov reporting and update badge

Author: jtblin

README.md

@@ -2,7 +2,7 @@
 
 [![npm package](https://badge.fury.io/js/angular-chart.js.svg)](https://badge.fury.io/js/angular-chart.js)
 [![CI](https://github.com/jtblin/angular-chart.js/actions/workflows/main.yml/badge.svg)](https://github.com/jtblin/angular-chart.js/actions/workflows/main.yml)
-[![code coverage](https://codecov.io/gh/jtblin/angular-chart.js/branch/main/graph/badge.svg)](https://codecov.io/gh/jtblin/angular-chart.js)
+[![code coverage](https://codecov.io/gh/jtblin/angular-chart.js/graph/badge.svg)](https://app.codecov.io/gh/jtblin/angular-chart.js)
 [![downloads](https://img.shields.io/npm/dm/angular-chart.js.svg?maxAge=2592000)](https://www.npmjs.com/package/angular-chart.js)
 
 Beautiful, reactive, responsive charts for Angular.JS using [Chart.js](http://www.chartjs.org/). 

karma.conf.js

@@ -12,9 +12,13 @@ module.exports = function(config) {
     ],
     exclude: [],
     reporters: ['progress', 'coverage'],
+    preprocessors: {
+      'dist/test.unit.bundled.js': ['coverage'],
+    },
     coverageReporter: {
       type: 'lcov',
       dir: 'coverage/',
+      subdir: '.',
     },
     port: 9876,
     colors: true,