Lerna improvements and package.json cleanups

[Skaiir]

[vsgoulart]

I'm getting this when running npm run build:watch:

> build:watch
> npm run build:watch:scope -- @bpmn-io/form-js


> build:watch:scope
> lerna run bundle:watch --stream --scope @bpmn-io/form-js

(node:403423) [DEP0040] DeprecationWarning: The `punycode` module is deprecated. Please use a userland alternative instead.
(Use `node --trace-deprecation ...` to show where the warning was created)
lerna notice cli v8.1.2
lerna notice filter including "@bpmn-io/form-js"
lerna info filter [ '@bpmn-io/form-js' ]

> @bpmn-io/form-js:"bundle:watch"

@bpmn-io/form-js: > @bpmn-io/[email protected] bundle:watch
@bpmn-io/form-js: > rollup -c -w --bundleConfigAsCjs
@bpmn-io/form-js: rollup v3.21.0
@bpmn-io/form-js: bundles src/index.js → dist/index.cjs, dist/index.es.js...
@bpmn-io/form-js: created dist/index.cjs, dist/index.es.js in 18ms
@bpmn-io/form-js: bundles src/editor.js → dist/form-editor.umd.js...
@bpmn-io/form-js: [!] (plugin commonjs--resolver) Error: Could not load /home/vinicius/repos/form-js/packages/form-js-editor/dist/index.es.js: ENOENT: no such file or directory, open '/home/vinicius/repos/form-js/packages/form-js-editor/dist/index.es.js'
@bpmn-io/form-js:     at open (node:internal/fs/promises:637:25)
@bpmn-io/form-js:     at Object.readFile (node:internal/fs/promises:1246:14)
@bpmn-io/form-js:     at /home/vinicius/repos/form-js/node_modules/rollup/dist/shared/rollup.js:24165:128
@bpmn-io/form-js:     at Queue.work (/home/vinicius/repos/form-js/node_modules/rollup/dist/shared/rollup.js:25134:32)
@bpmn-io/form-js: bundles src/viewer.js → dist/form-viewer.umd.js...
@bpmn-io/form-js: [!] (plugin commonjs--resolver) Error: Could not load /home/vinicius/repos/form-js/packages/form-js-viewer/dist/index.es.js: ENOENT: no such file or directory, open '/home/vinicius/repos/form-js/packages/form-js-viewer/dist/index.es.js'
@bpmn-io/form-js:     at open (node:internal/fs/promises:637:25)
@bpmn-io/form-js:     at Object.readFile (node:internal/fs/promises:1246:14)
@bpmn-io/form-js:     at /home/vinicius/repos/form-js/node_modules/rollup/dist/shared/rollup.js:24165:128
@bpmn-io/form-js:     at Queue.work (/home/vinicius/repos/form-js/node_modules/rollup/dist/shared/rollup.js:25134:32)
@bpmn-io/form-js: bundles src/playground.js → dist/form-playground.umd.js...
@bpmn-io/form-js: [!] (plugin commonjs--resolver) Error: Could not load /home/vinicius/repos/form-js/packages/form-js-playground/dist/index.es.js: ENOENT: no such file or directory, open '/home/vinicius/repos/form-js/packages/form-js-playground/dist/index.es.js'
@bpmn-io/form-js:     at open (node:internal/fs/promises:637:25)
@bpmn-io/form-js:     at Object.readFile (node:internal/fs/promises:1246:14)
@bpmn-io/form-js:     at /home/vinicius/repos/form-js/node_modules/rollup/dist/shared/rollup.js:24165:128
@bpmn-io/form-js:     at Queue.work (/home/vinicius/repos/form-js/node_modules/rollup/dist/shared/rollup.js:25134:32)