Unmaintainable by community

Hello,

This repo points to things that don't exists or are not publicly available.

For instance, the dev dependency `"@jsonforms/test": "^2.3.2"` doesn't exists and scripts points to path outside the repo:
```
"scripts": {
"bundle": "../../node_modules/.bin/webpack --config ./webpack.build.js --env=production --display-error-details",
"build": "../../node_modules/.bin/tsc",
"clean": "rm -rf lib coverage dist .nyc_output 2> /dev/null",
"lint": "../../node_modules/.bin/tslint --project tsconfig.json --exclude src/models/jsonSchema.ts",
"report": "../../node_modules/.bin/nyc report --reporter=html",
"test": "../../node_modules/.bin/ava",
"test-cov": "../../node_modules/.bin/nyc ../../node_modules/.bin/ava",
"doc": "../../node_modules/.bin/typedoc --name 'JSON Forms Web Component Wrapper' --mode file --excludeExternals --theme ../../typedoc-jsonforms --out docs src"
}
```

It would be nice to have it working on its own so it can be updated or extended with custom renderers.