build(deps-dev): bump @swc/core from 1.15.18 to 1.15.21 (#4881)

Bumps [@swc/core](https://github.com/swc-project/swc/tree/HEAD/packages/core) from 1.15.18 to 1.15.21.
- [Release notes](https://github.com/swc-project/swc/releases)
- [Changelog](https://github.com/swc-project/swc/blob/main/CHANGELOG.md)
- [Commits](https://github.com/swc-project/swc/commits/v1.15.21/packages/core)

---
updated-dependencies:
- dependency-name: "@swc/core"
  dependency-version: 1.15.21
  dependency-type: direct:development
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
Co-authored-by: Fleny <Fleny113@outlook.com>

packages/bot/package.json

@@ -33,7 +33,7 @@
   "devDependencies": {
     "@biomejs/biome": "2.4.8",
     "@swc/cli": "^0.8.0",
-    "@swc/core": "^1.15.18",
+    "@swc/core": "^1.15.21",
     "@types/chai": "^5.2.3",
     "@types/mocha": "^10.0.10",
     "@types/node": "^25.5.0",

packages/discordeno/package.json

@@ -33,7 +33,7 @@
   "devDependencies": {
     "@biomejs/biome": "2.4.8",
     "@swc/cli": "^0.8.0",
-    "@swc/core": "^1.15.18",
+    "@swc/core": "^1.15.21",
     "@types/chai": "^5.2.3",
     "@types/mocha": "^10.0.10",
     "@types/node": "^25.5.0",

packages/gateway/package.json

@@ -35,7 +35,7 @@
   "devDependencies": {
     "@biomejs/biome": "2.4.8",
     "@swc/cli": "^0.8.0",
-    "@swc/core": "^1.15.18",
+    "@swc/core": "^1.15.21",
     "@types/chai": "^5.2.3",
     "@types/mocha": "^10.0.10",
     "@types/node": "^25.5.0",

packages/rest/package.json

@@ -31,7 +31,7 @@
   "devDependencies": {
     "@biomejs/biome": "2.4.8",
     "@swc/cli": "^0.8.0",
-    "@swc/core": "^1.15.18",
+    "@swc/core": "^1.15.21",
     "@types/chai": "^5.2.3",
     "@types/chai-as-promised": "^8.0.2",
     "@types/mocha": "^10.0.10",

packages/types/package.json

@@ -26,7 +26,7 @@
   "devDependencies": {
     "@biomejs/biome": "2.4.8",
     "@swc/cli": "^0.8.0",
-    "@swc/core": "^1.15.18",
+    "@swc/core": "^1.15.21",
     "@types/mocha": "^10.0.10",
     "@types/node": "^25.5.0",
     "c8": "^11.0.0",

packages/utils/package.json

@@ -29,7 +29,7 @@
   "devDependencies": {
     "@biomejs/biome": "2.4.8",
     "@swc/cli": "^0.8.0",
-    "@swc/core": "^1.15.18",
+    "@swc/core": "^1.15.21",
     "@types/chai": "^5.2.3",
     "@types/mocha": "^10.0.10",
     "@types/node": "^25.5.0",