chore: bump electron devDependency from ^7.2.4 to ^39.8.5

[kparkinson-ld]

Requirements

• I have added test coverage for new or changed functionality
• I have followed the repository's pull request submission guidelines
• I have validated my changes against all supported platform versions

N/A — devDependency-only change, no application code affected.

Related issues

Resolves all 29 open Dependabot alerts (#1–#29), all targeting the electron devDependency.

Describe the solution you've provided

Bumps the electron devDependency from ^7.2.4 to ^39.8.5 in package.json. This resolves all 29 Dependabot security alerts:

• 4 high severity (CVSS 7.0–8.8) — use-after-free, renderer injection, heap buffer overflow
• 18 medium severity (CVSS 4.7–6.8) — ASAR bypass, IPC spoofing, protocol handler injection, etc.
• 4 low severity (CVSS 2.2–3.9) — clipboard crash, USB validation, login item path, subframe IPC

electron is a devDependency used only for the test runner (@jest-runner/electron). It is not shipped to consumers of the SDK, so this change has no impact on the published package.

Describe alternatives you've considered

• Dismissing alerts as devDependency-only — rejected since the alerts still show as open and represent real CVEs.
• Incremental bump to a lower version — rejected since alerts span up to fix version 39.8.5, and a partial bump would leave high-severity alerts unresolved.

Additional context

• spectron (deprecated, used only in integration tests via separate jest config) is incompatible with Electron 39.x but is not part of any Dependabot alert. It can be addressed in a follow-up if integration tests need to run.
• Lint (eslint) passes cleanly. TypeScript errors in node_modules/@types/node are pre-existing on main (old typescript@^3.9.7 vs modern type definitions) and unrelated to this change.

Link to Devin session: https://app.devin.ai/sessions/6647dfd07f80421ca49b42dac633beae
Requested by: @kparkinson-ld

---

Note

Low Risk
Single devDependency version bump with no application or published-package code changes; only local/test Electron usage is affected.

Overview
Bumps the electron devDependency from ^7.2.4 to ^39.8.5 in package.json to clear Dependabot security alerts (use-after-free, renderer injection, ASAR/IPC issues, and related CVEs).

Electron is used only for local/testing tooling (e.g. @jest-runner/electron), not the published SDK, so runtime behavior for consumers is unchanged. Integration tests that rely on spectron may need a separate follow-up on Electron 39.x compatibility.

^{Reviewed by Cursor Bugbot for commit 1d0ad04. Bugbot is set up for automated code reviews on this repo. Configure here.}

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[joker23]

I don't think this is going to work. Could you test the change with https://github.com/launchdarkly/hello-electron and see if the SDK could still work after updating.

[devin-ai-integration]

@joker23 Good call to verify. I tested this and here are the results:

SDK unit tests pass with electron 39:
All 6 test suites (38 tests) pass when running npm test against the bumped electron devDependency:

PASS  src/__tests__/LDClient-test.js
PASS  src/__tests__/LDClient-sync-test.js
PASS  src/__tests__/LDClient-streaming-test.js
PASS  src/__tests__/nodeSdkEmulation-test.js
PASS  src/__tests__/LDClient-tls-test.js
PASS  src/__tests__/LDClient-events-test.js
Test Suites: 6 passed, 6 total
Tests:       38 passed, 38 total

The electron devDep is not shipped to consumers:
electron is listed only in devDependencies — it's used by @jest-runner/electron to run tests in an Electron environment. When consumers npm install launchdarkly-electron-client-sdk, they get only the production dependencies (electron-json-storage, launchdarkly-js-client-sdk, etc.). Verified in hello-electron: the installed SDK package has no nested electron in node_modules.

hello-electron has a pre-existing issue unrelated to this PR:
hello-electron pins electron@12.2.3 as its own dependency, and currently crashes with TypeError: Object.hasOwn is not a function because electron 12's Node.js runtime doesn't support Object.hasOwn (needed by a winston transitive dep @so-ric/colorspace). This happens on main today and is unrelated to this PR.

One thing to note: The SDK's rendererClient.js uses electron.remote.require(), which was removed in Electron 14+. This means the SDK's renderer client functionality is already incompatible with Electron >=14 regardless of this PR — that's a pre-existing limitation of the SDK itself, not something introduced by this devDependency bump.