fix(security): bump tar + transitive deps via npm audit fix (#222)

Detected by Aeon + osv-scanner.
Severity: high (runtime tar) / high+moderate (dev deps)

Patches 8 of 14 CVEs flagged by osv-scanner — all that can be fixed
within current semver ranges via `npm audit fix --package-lock-only`.
The remaining 6 are gated on a puppeteer-core/vitest major-version
bump (out of scope for this PR).

Runtime (shipped to users):
- tar 7.5.9 -> 7.5.15
  - GHSA-9ppj-qmqm-q256 HIGH: Symlink Path Traversal via Drive-Relative Linkpath
  - GHSA-qffp-2rhf-9h96 HIGH: Hardlink Path Traversal via Drive-Relative Linkpath
  - Reachable in js/src/download.ts (extractTar) — the existing filter() rejects
    absolute paths and "..", but does not inspect linkpath, so a malicious
    Chromium tarball could write outside the cache dir on Windows.

Dev (build-time only):
- basic-ftp 5.2.0 -> 5.3.1 (4 HIGH: CRLF injection x2, DoS x2)
- ip-address 10.1.0 -> 10.2.0 (1 MOD: XSS in Address6 HTML methods)
- postcss 8.5.6 -> 8.5.14 (1 MOD: XSS via unescaped </style>)

Lockfile metadata side-effects (npm-regenerated, not editorial):
- name@version block synced from package.json (0.3.23 -> 0.3.28)
- devDependencies + peerDependencies version ranges synced to current
  package.json (the lockfile was stale relative to head package.json)

Verification:
- `npm test` -> 320 passed / 11 skipped / 0 failed (9 test files)
- `npm run typecheck` -> clean
- osv-scanner before: 14 CVEs; after: 6 (those 6 need a breaking
  major-version bump to land — happy to follow up if you want it)

Co-authored-by: Aeon <aeon@aaronjmars.eth>

js/package-lock.json

@@ -1092,9 +1092,9 @@
       "license": "MIT"
     },
     "node_modules/basic-ftp": {
-      "version": "5.2.0",
-      "resolved": "https://registry.npmjs.org/basic-ftp/-/basic-ftp-5.2.0.tgz",
-      "integrity": "sha512-VoMINM2rqJwJgfdHq6RiUudKt2BV+FY5ZFezP/ypmwayk68+NzzAQy4XXLlqsGD4MCzq3DrmNFD/uUmBJuGoXw==",
+      "version": "5.3.1",
+      "resolved": "https://registry.npmjs.org/basic-ftp/-/basic-ftp-5.3.1.tgz",
+      "integrity": "sha512-bopVNp6ugyA150DDuZfPFdt1KZ5a94ZDiwX4hMgZDzF+GttD80lEy8kj98kbyhLXnPvhtIo93mdnLIjpCAeeOw==",
       "dev": true,
       "license": "MIT",
       "engines": {
@@ -1685,9 +1685,9 @@
       "license": "BSD-3-Clause"
     },
     "node_modules/ip-address": {
-      "version": "10.1.0",
-      "resolved": "https://registry.npmjs.org/ip-address/-/ip-address-10.1.0.tgz",
-      "integrity": "sha512-XXADHxXmvT9+CRxhXg56LJovE+bmWnEWB78LB83VZTprKTmaC5QfruXocxzTZ2Kl0DNwKuBdlIhjL8LeY8Sf8Q==",
+      "version": "10.2.0",
+      "resolved": "https://registry.npmjs.org/ip-address/-/ip-address-10.2.0.tgz",
+      "integrity": "sha512-/+S6j4E9AHvW9SWMSEY9Xfy66O5PWvVEJ08O0y5JGyEKQpojb0K0GKpz/v5HJ/G0vi3D2sjGK78119oXZeE0qA==",
       "dev": true,
       "license": "MIT",
       "engines": {
@@ -2115,9 +2115,9 @@
       }
     },
     "node_modules/postcss": {
-      "version": "8.5.6",
-      "resolved": "https://registry.npmjs.org/postcss/-/postcss-8.5.6.tgz",
-      "integrity": "sha512-3Ybi1tAuwAP9s0r1UQ2J4n5Y0G05bJkpUIO0/bI9MhwmD70S5aTWbXGBwxHrelT+XM1k6dM0pk+SwNkpTRN7Pg==",
+      "version": "8.5.14",
+      "resolved": "https://registry.npmjs.org/postcss/-/postcss-8.5.14.tgz",
+      "integrity": "sha512-SoSL4+OSEtR99LHFZQiJLkT59C5B1amGO1NzTwj7TT1qCUgUO6hxOvzkOYxD+vMrXBM3XJIKzokoERdqQq/Zmg==",
       "dev": true,
       "funding": [
         {
@@ -2497,9 +2497,9 @@
       }
     },
     "node_modules/tar": {
-      "version": "7.5.9",
-      "resolved": "https://registry.npmjs.org/tar/-/tar-7.5.9.tgz",
-      "integrity": "sha512-BTLcK0xsDh2+PUe9F6c2TlRp4zOOBMTkoQHQIWSIzI0R7KG46uEwq4OPk2W7bZcprBMsuaeFsqwYr7pjh6CuHg==",
+      "version": "7.5.15",
+      "resolved": "https://registry.npmjs.org/tar/-/tar-7.5.15.tgz",
+      "integrity": "sha512-dzGK0boVlC4W5QFuQN1EFSl3bIDYsk7Tj40U6eIBnK2k/8ml7TZ5agbI5j5+qnoVcAA+rNtBml8SEiLxZpNqRQ==",
       "license": "BlueOak-1.0.0",
       "dependencies": {
         "@isaacs/fs-minipass": "^4.0.0",