chore: pin @types/node to exact version 25.3.3 and fix tsconfig

Author: jourlez

package.json

@@ -133,7 +133,7 @@
     "@decentralchain/transactions": "5.0.0",
     "@evilmartians/lefthook": "2.1.3",
     "@size-limit/preset-small-lib": "12.0.0",
-    "@types/node": "^25.3.3",
+    "@types/node": "25.3.3",
     "@vitest/coverage-v8": "4.0.18",
     "publint": "0.3.18",
     "size-limit": "12.0.0",

src/tools/stringify.ts

@@ -12,7 +12,7 @@ const FIELDS: string[] = [
 export default function <T extends object>(data: T): string {
   return JSON.stringify(
     data,
-    function (this: Record<string, unknown>, key: string, value: unknown) {
+    function (this: { type?: string; [key: string]: unknown }, key: string, value: unknown) {
       if (FIELDS.includes(key)) {
         return `!${String(value)}!`;
       } else if (key === 'value' && this.type === 'integer') {

tsconfig.json

@@ -18,7 +18,7 @@
     "noUncheckedIndexedAccess": true,
     "exactOptionalPropertyTypes": true,
     "noImplicitOverride": true,
-    "noPropertyAccessFromIndexSignature": false,
+    "noPropertyAccessFromIndexSignature": true,
     "forceConsistentCasingInFileNames": true,
     "esModuleInterop": true,
     "skipLibCheck": true,