Add ts-loader to karma + webpack configuration, enabling karma tests to work

Author: Matt Carroll

packages/optimizely-sdk/karma.base.conf.js

@@ -24,6 +24,18 @@ module.exports = {
 
   webpack: {
     mode: 'production',
+    module: {
+      rules: [
+        {
+          test: /\.[tj]s$/,
+          use: 'ts-loader',
+          exclude: /node_modules/,
+        },
+      ],
+    },
+    resolve: {
+      extensions: ['.ts', '.js'],
+    },
   },
 
   //browserStack setup

packages/optimizely-sdk/package-lock.json

@@ -76,6 +76,7 @@
     "rollup-plugin-terser": "^5.3.0",
     "rollup-plugin-typescript2": "^0.27.1",
     "sinon": "^2.3.1",
+    "ts-loader": "^7.0.5",
     "ts-node": "^8.10.2",
     "typescript": "^3.3.3333",
     "webpack": "^4.42.1"