Extension update available to older versions of VSCode

[wmaurer]

• VSCode Version: 1.5.3
• OS Version: Windows 10 x64

A user has reported that an extension update for vscode-jumpy is available: wmaurer/vscode-jumpy#3
However the newest update requires engine ^1.6.0.

Clicking the update button doesn't apply the newest extension version (correct, as expected).

The bug is, that the newest update requiring ^1.6.0 should not be available to users of 1.5.3. Or at least a warning should be displayed saying the newest version of the extension is only compatible with newer versions of VSCode.

[joaomoreno]

We fixed this for 1.6 in #11573.

Before the fix, users got notifications (bug) but the new version would not be installed (as expected).

With the fix, the notification doesn't even come up.

[wmaurer]

Ok, thanks a lot for fixing it already! 👏