chore: add ts7 check

Author: ClaudiuCeia

README.md

@@ -71,6 +71,8 @@ preserved.
 ## Development
 
 - Run all checks: `deno task check`.
+- Try the experimental TypeScript 7 native checker: `deno task check:ts7`.
+  Release CI continues to use Deno's stable default checker.
 - Run only tests: `deno task test` (requires
   `--allow-read --allow-write --allow-ffi --allow-env` because `sharp` uses
   native bindings, reads fixtures, and the `save()` test writes to a temporary

deno.json

@@ -17,6 +17,7 @@
   },
   "tasks": {
     "check": "deno fmt --check && deno lint && deno check mod.ts && deno check --config docs/deno.json docs/main.ts && deno task test",
+    "check:ts7": "deno check --unstable-tsgo mod.ts && deno check --unstable-tsgo --config docs/deno.json docs/main.ts && deno test --unstable-tsgo --allow-read --allow-write --allow-ffi --allow-env",
     "test": "deno test --allow-read --allow-write --allow-ffi --allow-env"
   },
   "imports": {