fix: vitest pool config and coverage

Author: Adrijan-Petek

vitest.config.ts

@@ -1,15 +1,18 @@
 import { defineConfig } from "vitest/config";
 
 export default defineConfig({
+  poolOptions: {
+    threads: { singleThread: true },
+    forks: { singleFork: true },
+  },
   test: {
     environment: "clarinet",
     pool: "forks",
-    poolOptions: {
-      threads: { singleThread: true },
-      forks: { singleFork: true },
-    },
     setupFiles: [
       "node_modules/@stacks/clarinet-sdk/vitest-helpers/src/vitest.setup.ts",
     ],
+    coverage: {
+      enabled: false,
+    },
   },
 });