chore: Update AVA configs

Author: octet-stream

ava.config.js

@@ -1,8 +1,5 @@
 export default {
   failFast: true,
-  environmentVariables: {
-    TS_NODE_PROJECT: "./tsconfig.ava.json"
-  },
   extensions: {
     ts: "module"
   },

tsconfig.json

@@ -18,5 +18,8 @@
     "moduleResolution": "node16",
     "forceConsistentCasingInFileNames": true,
     "allowSyntheticDefaultImports": true
+  },
+  "ts-node": {
+    "transpileOnly": true
   }
 }