Set --use-spawn-wrap so it works under CI

Author: andyleejordan

package.json

@@ -92,6 +92,7 @@
     "extends": "@istanbuljs/nyc-config-typescript",
     "all": false,
     "check-coverage": false,
+    "use-spawn-wrap": true,
     "include": [
       "out/**/*.js",
       "src/**/*.ts"