fix: widen @oven/bun-* version range to improve install compatibility

Lower the minimum version of @oven/bun-* optional dependencies from
^1.3.4 to ^1.2.21. This is the lowest common version available across
all platform-specific packages, improving compatibility for contributors
who may not have access to the latest package versions.

The caret range (^) still allows npm to install newer versions when
available.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <[email protected]>

Author: ochafik

package-lock.json

@@ -97,17 +97,17 @@
     "prettier": "^3.6.2"
   },
   "optionalDependencies": {
-    "@oven/bun-darwin-aarch64": "^1.3.4",
-    "@oven/bun-darwin-x64": "^1.3.4",
-    "@oven/bun-darwin-x64-baseline": "^1.3.4",
-    "@oven/bun-linux-aarch64": "^1.3.4",
-    "@oven/bun-linux-aarch64-musl": "^1.3.4",
-    "@oven/bun-linux-x64": "^1.3.4",
-    "@oven/bun-linux-x64-baseline": "^1.3.4",
-    "@oven/bun-linux-x64-musl": "^1.3.4",
-    "@oven/bun-linux-x64-musl-baseline": "^1.3.4",
-    "@oven/bun-windows-x64": "^1.3.4",
-    "@oven/bun-windows-x64-baseline": "^1.3.4",
+    "@oven/bun-darwin-aarch64": "^1.2.21",
+    "@oven/bun-darwin-x64": "^1.2.21",
+    "@oven/bun-darwin-x64-baseline": "^1.2.21",
+    "@oven/bun-linux-aarch64": "^1.2.21",
+    "@oven/bun-linux-aarch64-musl": "^1.2.21",
+    "@oven/bun-linux-x64": "^1.2.21",
+    "@oven/bun-linux-x64-baseline": "^1.2.21",
+    "@oven/bun-linux-x64-musl": "^1.2.21",
+    "@oven/bun-linux-x64-musl-baseline": "^1.2.21",
+    "@oven/bun-windows-x64": "^1.2.21",
+    "@oven/bun-windows-x64-baseline": "^1.2.21",
     "@rollup/rollup-darwin-arm64": "^4.53.3",
     "@rollup/rollup-darwin-x64": "^4.53.3",
     "@rollup/rollup-linux-arm64-gnu": "^4.53.3",

package.json

@@ -108,7 +108,7 @@ function findBunBinary() {
 async function downloadBunForWindowsArm64() {
   // Windows ARM64 can run x64 binaries via emulation
   const pkg = "bun-windows-x64-baseline";
-  const version = "1.3.4";
+  const version = "1.2.21";
   const url = `https://registry.npmjs.org/@oven/${pkg}/-/${pkg}-${version}.tgz`;
   const destDir = join(nodeModules, "@oven", pkg);