chore(deps): bump typescript ^5.4.0 → ^6.0

TS 6.0 is the cleanup release before TS 7 (deprecations become errors).
- typecheck (`tsc --noEmit`) passes clean.
- Added `ignoreDeprecations: "6.0"` to tsconfig because tsup's DTS build injects
  `baseUrl` (deprecated in 6.0, removed in 7.0) — without it, `tsup --dts` errors and
  ships no .d.ts files. This is the TS-team-recommended interim silencer; revisit when
  tsup stops injecting baseUrl.
- Full build (ESM + CJS + DTS) and typecheck both green.

Author: Mlaz-code

package-lock.json

@@ -55,7 +55,7 @@
   "devDependencies": {
     "@biomejs/biome": "2.4.12",
     "tsup": "^8.0.0",
-    "typescript": "^5.4.0",
+    "typescript": "^6.0.3",
     "vitest": "^3.0.0"
   }
 }

package.json

@@ -4,6 +4,7 @@
     "module": "ESNext",
     "moduleResolution": "bundler",
     "lib": ["ES2020", "DOM"],
+    "ignoreDeprecations": "6.0",
     "strict": true,
     "esModuleInterop": true,
     "skipLibCheck": true,