Add a link to the #231 issue as searching the issue by hand is cumbersome

This reverts commit fde36ff5.

Breaks Olm based E2EE because Olm uses WASM and
https://github.com/electron/electron/issues/25127

This reverts commit b2a349a7.

There is no need to send a HEAD request to the server since we now
bundle external_api.js.

The bug has since been fixed in Chromium.

Bumps [bl](https://github.com/rvagg/bl) from 4.0.2 to 4.0.3.
- [Release notes](https://github.com/rvagg/bl/releases)
- [Commits](https://github.com/rvagg/bl/compare/v4.0.2...v4.0.3

)

Signed-off-by: dependabot[bot] <support@github.com>

Bumps [elliptic](https://github.com/indutny/elliptic) from 6.5.2 to 6.5.3.
- [Release notes](https://github.com/indutny/elliptic/releases)
- [Commits](https://github.com/indutny/elliptic/compare/v6.5.2...v6.5.3

)

Signed-off-by: dependabot[bot] <support@github.com>

Bumps [lodash](https://github.com/lodash/lodash) from 4.17.15 to 4.17.19.
- [Release notes](https://github.com/lodash/lodash/releases)
- [Commits](https://github.com/lodash/lodash/compare/4.17.15...4.17.19

)

Signed-off-by: dependabot[bot] <support@github.com>

in German and English translations

Perform command-line protocol argument handling on all platforms, not only
win32. This allows the client to join a meeting passed on the command-line
even if it is no instance of the client already running.

The linter will run on a GH action now.