Update Infra #969 - Replace isparta with istanbul

Author: blainekasten

.babelrc

@@ -17,6 +17,6 @@
       "plugins": [
         "transform-decorators-legacy"
       ]
-    }
+    },
   }
 }

karma.conf.js

@@ -1,10 +1,5 @@
 const path = require('path');
 
-// Note: If we switch to ESM version of babelified files, we'll likely need to
-// update from the ancient isparta-loader. Likely we'll switch to:
-// https://github.com/istanbuljs/babel-plugin-istanbul with a `test` BABEL_ENV
-//
-// https://github.com/FormidableLabs/radium/issues/969
 process.env.BABEL_ENV = 'commonjs';
 
 module.exports = function(config) {
@@ -34,17 +29,15 @@ module.exports = function(config) {
             include: path.resolve('src/__tests__/'),
             loader: 'babel-loader'
           },
-          {
-            test: /\.js$/,
-            include: path.resolve('src/'),
-            enforce: 'pre',
-            exclude: /(__tests__|__mocks__)/,
-            loader: 'isparta-loader?babel-loader'
-          },
           {
             test: /\.js$/,
             exclude: [/node_modules/],
-            loader: 'babel-loader'
+            use: {
+              loader: 'babel-loader',
+              options: {
+                plugins: ['istanbul']
+              }
+            }
           },
           {
             test: /\.css$/,

package.json

@@ -74,6 +74,7 @@
   },
   "devDependencies": {
     "babel-eslint": "^7.1.1",
+    "babel-plugin-istanbul": "^5.1.0",
     "caniuse-api": "^2.0.0",
     "chai": "^3.5.0",
     "color": "^1.0.3",
@@ -89,7 +90,6 @@
     "express-http-proxy": "^0.11.0",
     "flow-bin": "^0.53.1",
     "inject-loader": "^3.0.1",
-    "isparta-loader": "^2.0.0",
     "jsdom": "^12.0.0",
     "jsdom-global": "^3.0.2",
     "karma": "^3.0.0",