feat: upgrade Node.js runtime from node20 to node24 (#123)

GitHub Actions is deprecating the Node.js 20 runtime, with enforcement
starting June 2, 2026. This updates the action to use node24 runtime.

- action.yml: change `using: "node20"` to `using: "node24"`
- package.json: bump `@types/node` from ^20.16.5 to ^24

Fixes #122

Co-authored-by: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
(cherry picked from commit 6a293fc1a2)

action.yml

@@ -26,7 +26,7 @@ outputs:
   release-channel:
     description: "The release channel of the installed version."
 runs:
-  using: "node20"
+  using: "node24"
   main: "dist/main.mjs"
   post: "dist/post.mjs"
   post-if: always()

deno.lock

@@ -5,7 +5,7 @@
     "npm:@actions/core@^1.11.1": "1.11.1",
     "npm:@actions/glob@0.5": "0.5.0",
     "npm:@actions/tool-cache@^2.0.2": "2.0.2",
-    "npm:@types/node@^20.16.5": "20.17.47",
+    "npm:@types/node@24": "24.12.0",
     "npm:@types/semver@^7.7.0": "7.7.0",
     "npm:semver@^7.7.1": "7.7.2",
     "npm:tsdown@0.10.1": "0.10.1_rolldown@1.0.0-beta.8-commit.852c603__valibot@1.0.0",
@@ -511,8 +511,8 @@
         "tslib@2.8.1"
       ]
     },
-    "@types/node@20.17.47": {
-      "integrity": "sha512-3dLX0Upo1v7RvUimvxLeXqwrfyKxUINk0EAM83swP2mlSUcwV73sZy8XhNz8bcZ3VbsfQyC/y6jRdL5tgCNpDQ==",
+    "@types/node@24.12.0": {
+      "integrity": "sha512-GYDxsZi3ChgmckRT9HPU0WEhKLP08ev/Yfcq2AstjrDASOYCSXeyjDsHg4v5t4jOj7cyDX3vmprafKlWIG9MXQ==",
       "dependencies": [
         "undici-types"
       ]
@@ -1021,8 +1021,8 @@
         "quansync"
       ]
     },
-    "undici-types@6.19.8": {
-      "integrity": "sha512-ve2KP6f/JnbPBFyobGHuerC9g1FYGn/F8n1LWTwNxCEzd6IfqTwUQcNXgEtmmQ6DlRrC1hrSrBnCZPokRrDHjw=="
+    "undici-types@7.16.0": {
+      "integrity": "sha512-Zz+aZWSj8LE6zoxD+xrjh4VfkIG8Ya6LvYkZqtUQGJPZjYl53ypCaUwWqo7eI0x66KBGeRo+mlBEkMSeSZ38Nw=="
     },
     "undici@5.29.0": {
       "integrity": "sha512-raqeBD6NQK4SkWhQzeYKd1KmIG6dllBOTt55Rmkt4HtI9mwdWtJljnrXjAFUBLTSN67HWrOIZ3EPF4kjUw80Bg==",
@@ -1087,7 +1087,7 @@
         "npm:@actions/core@^1.11.1",
         "npm:@actions/glob@0.5",
         "npm:@actions/tool-cache@^2.0.2",
-        "npm:@types/node@^20.16.5",
+        "npm:@types/node@24",
         "npm:@types/semver@^7.7.0",
         "npm:semver@^7.7.1",
         "npm:tsdown@0.10.1",

package.json

@@ -12,7 +12,7 @@
     "@actions/tool-cache": "^2.0.2",
     "semver": "^7.7.1",
     "undici": "^7.8.0",
-    "@types/node": "^20.16.5",
+    "@types/node": "^24",
     "@types/semver": "^7.7.0",
     "tsdown": "0.10.1"
   }