Fix import of is-electron (#9729)

[planger]

Fix #9729

Signed-off-by: Philip Langer planger@eclipsesource.com

What it does

This change replaces the import is-electron with a require to workaround the error

root ERROR Error starting the debug session TypeError: is_electron_1.default is not a function
    at Object.startDebugAdapter (/home/philip/Git/OpenSource/Theia/theia/packages/plugin-ext/lib/plugin/node/debug/plugin-debug-adapter-starter.js:44:48)
    at DebugExtImpl.<anonymous> (/home/philip/Git/OpenSource/Theia/theia/packages/plugin-ext/lib/plugin/node/debug/debug.js:725:82)
    at step (/home/philip/Git/OpenSource/Theia/theia/packages/plugin-ext/lib/plugin/node/debug/debug.js:33:23)
    at Object.next (/home/philip/Git/OpenSource/Theia/theia/packages/plugin-ext/lib/plugin/node/debug/debug.js:14:53)
    at fulfilled (/home/philip/Git/OpenSource/Theia/theia/packages/plugin-ext/lib/plugin/node/debug/debug.js:5:58)
    at processTicksAndRejections (internal/process/task_queues.js:97:5)

How to test

Please follow the steps to reproduce documented in #9729 and check the console that the error above doesn't occur.

Review checklist

• as an author, I have thoroughly tested my changes and carefully followed the review guidelines

Reminder for reviewers

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[planger]

Thanks a lot for the fast review @paul-marechal!

[paul-marechal]

It's a trivial change and looking at how the package is implemented vs its declaration it makes a lot of sense.

Thanks for the fix!