tell mocha to ignore the fixtures too

Author: abendigo

.mocharc.json

@@ -2,6 +2,7 @@
   "require": ["./env.js"],
   "extension": ["ts"],
   "recursive": true,
+  "exclude": "test/fixtures/**",
   "node-option": [
     "experimental-specifier-resolution=node",
     "loader=ts-node/esm"