Bump electron from 16.2.8 to 21.1.0 in /template

[dependabot[bot]]

Bumps electron from 16.2.8 to 21.1.0.

Release notes

Sourced from electron's releases.

electron v21.1.0

Release Notes for v21.1.0

Features

• Added WebContents.opener to access window opener.
  • Added webContents.fromFrame(frame) to get the WebContents corresponding to a WebFrameMain instance. #35819

Fixes

• Provided display_id for desktopCapturer on Linux. #35836 (Also in 19, 20)

Other Changes

• Updated Chromium to 106.0.5249.91. #35871

Documentation

• Documentation changes: #35907

electron v21.0.1

Release Notes for v21.0.1

Fixes

• Fixed: If a custom Electron build contains an electron.d.ts file, it is now being used. #35822 (Also in 20)

Other Changes

• Updated Chromium to 106.0.5249.61. #35833

electron v21.0.0

Release Notes for v21.0.0

Stack Upgrades

• Chromium 106.0.5249.51
  • New in 106
  • New in 105
• Node v16.16.0
  • v16.16.0 release notes
• V8 v10.6

Breaking Changes

• Enabled the V8 memory cage for external buffers. See https://www.electronjs.org/blog/v8-memory-cage for more details. #34724
• Refactored webContents.printToPDF to align with the Chrome Devtools implementation. #33654

Features

• Added LoadBrowserProcessSpecificV8Snapshot as a new fuse that will let the main/browser process load its v8 snapshot from a file at browser_v8_context_snapshot.bin. Any other process will use the same path as is used today. #35695 (Also in 20)
• Added app.getSystemLocale() method. #35794
• Added webFrameMain.origin. #35534 (Also in 19, 20)
• Added deprecation warning for the new-window event. #34528 (Also in 20)
• Added immersive dark mode on Windows. #33624 (Also in 20)

... (truncated)

Commits

• 2b69b32 Bump v21.1.0
• 63beca3 docs: update supported Mac versions (#35914)
• 4cd78df chore: bump chromium to 106.0.5249.91 (21-x-y) (#35871)
• 3895599 docs: update bluetooth fiddle example event name to trigger correct event (#3...
• 572a9b1 fix: TryCatch scope in node_bindings (#35895)
• 12d9fe3 fix: set display_id in desktop capturer on Linux (#35836)
• 32b6417 feat: add WebContents.opener and webContents.fromFrame() (#35819)
• cb22573 Bump v21.0.1
• 78ffd4f build: fix deps workflow tag comparison (#35844)
• a183995 chore: bump chromium to 106.0.5249.61 (21-x-y) (#35833)
• Additional commits viewable in compare view

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Superseded by #964.