Release beta version of all plugins

[maribethb]

We have the next major release of blockly in beta right now. However, most of the plugins have not yet been updated to be compatible with that version. Anyone who is using any plugins will not be able to cleanly use blockly@beta until they can also use beta versions of the plugins that are listed as compatible with the beta. The issue is the peerDependencies for each plugin specify a version of Blockly that does not include the beta, so npm install will fail as the peer dependencies are not met. See https://groups.google.com/g/blockly/c/MpMkF-hgloA for more context.

The following bugs need to be resolved before this is possible:

• Investigate "cannot redefine property: alert" error while running tests with Blockly beta version #902
• block-extension-tooltip not rendering tooltip correctly #899
• Fix mocks in typed-variable-modal test #907
• Update eslint-related packages #917

Note that the following plugins have already been released as beta versions. If a project depends only on plugins listed below, then these dependencies are already compatible with blockly@beta.

• block-test
• eslint-config
• dev-scripts
• dev-tools
• theme-dark
• theme-deuteranopia
• theme-highcontrast
• theme-tritanopia

(If you are wondering how this list was derived, it is all of the plugins that dev-tools rely on that also rely on blockly, plus the plugins related to eslint)

[maribethb]

Note that for the plugins that have already been released as beta, that was done by hand and not with Lerna. If we run into lerna having version issues next time we use it, it's almost certainly because of this, but I don't think there was a way around it since not all of the packages were ready to publish.

[maribethb]

The changes I made locally in order to publish the betas are here: https://github.com/google/blockly-samples/compare/2021_q4_release...maribethb:release-beta?expand=1

tbh I'm not sure whether we want to commit these to the repo or let lerna do it when we're ready to release all of them, so I'm just leaving this here so I can decide later.

[maribethb]

All plugins have now been released (not as beta) so this is irrelevant now