Upgrade to Deno 2.3.1

Author: kwj

typescript/README.md

@@ -21,15 +21,15 @@ sh solve.sh 31 32 33
 
 ## Notes
 
-Caution: These solutions aren't good examples for programming because I'm a JavaScript/TypeScript newbie.
+Caution: These solutions aren't good examples for learning programming because I'm new to JavaScript/TypeScript.
 
 These solutions were confirmed to work in the following version.
 
 ```console
 $ deno --version
-deno 2.2.2 (stable, release, aarch64-unknown-linux-gnu)
-v8 13.4.114.9-rusty
-typescript 5.7.3
+deno 2.3.1 (stable, release, aarch64-unknown-linux-gnu)
+v8 13.5.212.10-rusty
+typescript 5.8.3
 ```
 
 I used the following libraries/packages in addition to the runtime APIs part of Deno.

typescript/euler/deno.json

@@ -7,6 +7,11 @@
   },
   "tasks": {
     "solver": "deno run --quiet --allow-read ./main.ts",
-    "test": "deno test --allow-read ./test/"
+    "test": "deno test --allow-read ./test/",
+    "check": "deno check .",
+    "format": "deno fmt --check ."
+  },
+  "compilerOptions": {
+    "erasableSyntaxOnly": true
   }
 }