Error with generated theia plugin templates

[arunswarnam]

I am trying to pack my hello world theia plugin to see how to ship a theia plugin once developed and I am seeing these errors with the scaffold-ed code
`13:44 $ yo @theia/plugin

 _-----_
|       |    ╭──────────────────────────╮
|--(o)--|    │   Welcome to the 'Theia  │

---------´ │ Plug-in' generator! │ ( _´U_ ) ╰──────────────────────────╯
/A\ /
| ~ |
'..'_
´ |° ´ Y

? What is the plug-in's name? test-plugin
? What type of plug-in do you want? Backend plug-in, it will run on the server side.
? Please, choose a template: Samples
? Please, choose the sample: Quick Pick sample
License is not specified. You can do it via --license parameter.
create test-plugin/package.json
create test-plugin/.gitignore
create test-plugin/README.md
create test-plugin/tsconfig.json
create test-plugin/tsfmt.json
create test-plugin/src/test-plugin-backend.ts
Installing dependencies with yarn...
yarn install v1.22.10
info No lockfile found.
[1/5] Validating package.json...
[2/5] Resolving packages...
[3/5] Fetching packages...
[4/5] Linking dependencies...
[5/5] Building fresh packages...
success Saved lockfile.
$ yarn run clean && yarn run build
yarn run v1.22.10
$ rimraf lib
Done in 0.15s.
yarn run v1.22.10
$ yarn run format-code && yarn run compile && theia-plugin pack
$ tsfmt -r
replaced /Users/aswarnam/workspace/theia/test-plugin/src/test-plugin-backend.ts
$ tsc
../node_modules/dom-serializer/lib/index.d.ts(1,13): error TS1005: '=' expected.
../node_modules/dom-serializer/lib/index.d.ts(1,27): error TS1005: ';' expected.
../node_modules/domutils/lib/helpers.d.ts(1,13): error TS1005: '=' expected.
../node_modules/domutils/lib/helpers.d.ts(1,27): error TS1005: ';' expected.
../node_modules/domutils/lib/legacy.d.ts(1,13): error TS1005: '=' expected.
../node_modules/domutils/lib/legacy.d.ts(1,36): error TS1005: ';' expected.
../node_modules/domutils/lib/manipulation.d.ts(1,13): error TS1005: '=' expected.
../node_modules/domutils/lib/manipulation.d.ts(1,36): error TS1005: ';' expected.
../node_modules/domutils/lib/querying.d.ts(1,13): error TS1005: '=' expected.
../node_modules/domutils/lib/querying.d.ts(1,36): error TS1005: ';' expected.
../node_modules/domutils/lib/stringify.d.ts(1,13): error TS1005: '=' expected.
../node_modules/domutils/lib/stringify.d.ts(1,27): error TS1005: ';' expected.
../node_modules/domutils/lib/tagtypes.d.ts(1,13): error TS1005: '=' expected.
../node_modules/domutils/lib/tagtypes.d.ts(1,64): error TS1005: ';' expected.
../node_modules/domutils/lib/traversal.d.ts(1,13): error TS1005: '=' expected.
../node_modules/domutils/lib/traversal.d.ts(1,54): error TS1005: ';' expected.
info Visit https://yarnpkg.com/en/docs/cli/run for documentation about this command.
info Visit https://yarnpkg.com/en/docs/cli/run for documentation about this command.
info Visit https://yarnpkg.com/en/docs/cli/install for documentation about this command.
`
Not sure what should I be doing to pack and ship a theia plugin.

[arunswarnam]

I figured to pack a theia plugin by executing yarn theia-plugin pack from inside the plug in folder. Also, I was always able to run this plugin in the hosted mode.
Not sure why the above error shows up on $ tsc and if the above error is something that needs to be looked into.

[ahczbhht1989]

I got some problem

[Rachol]

Theia has dropped support for the tsc version specified in the plugin. Install newer version of typescript and the errors will disappear.