html: builtin displays an error notification

[vince-fugnitto]

Bug Description:

Following #7972, the vscode-builtin-html-language-features displays an error notification when a html file is opened. Originally commented: #7972 (review)

Steps to Reproduce:

I reproduced the issue in the following way:

1. start the application
2. create a new html file, ex: a.html
3. the error is displayed

[kittaakos]

Another issue was logged here:

• Open a HTML file:

root INFO [hosted-plugin: 10818] PLUGIN_HOST(10818): PluginManagerExtImpl/loadPlugin(/Users/akos.kitta/git/theia/plugins/vscode-builtin-npm/extension/dist/main)
root ERROR [hosted-plugin: 10818] Promise rejection not handled in one second: TypeError: s.SemanticTokensLegend is not a constructor , reason: TypeError: s.SemanticTokensLegend is not a constructor
root ERROR [hosted-plugin: 10818] With stack trace: TypeError: s.SemanticTokensLegend is not a constructor
   at b.sendRequest.then.e (/Users/akos.kitta/git/theia/plugins/vscode-builtin-html-langua

[vince-fugnitto]

registerOnTypeRenameProvider is currently a proposed API:

• https://github.com/microsoft/vscode/blob/cda677da090fa640646b676706ab2e8fe059580e/src/vs/vscode.proposed.d.ts#L1216-L1230

[akosyakov]

But experience is bad, we should either try a version before or port the implementation. I am not sure whether it is possible, maybe a new version of Monaco is required, not even 0.20 but newer.

[shahar-h]

Error notification is not displayed with 1.39.1, but rename is not supported there.
All other features are working according to the tests in #7972.

[akosyakov]

Confirmed we need a new Monaco version which was not even yet published.

[a1994846931931]

I can confirm that the latest version (1.47.1) of HTML Language Features (built-in) works fine with Theia.

[vince-fugnitto]

Closed thanks to #8224.