* Upgrade Typescript
* Upgrade prettier
* Upgrade eslint-typescript
* Don't abide extra else
* Remove eslint plugin that we don't use any more
* Remove unused Webpack plugin
* Remove eslint rule that we don't really need
* Remove unused Jest plugin
* Remove redundant package
* Prettier fixes
* Make modern part of the code base
`yarn modern` will now start a dev server with the modern app running.
The debugger is not yet setup
`yarn test` will run all the tests, both Webamp and "modern".
* Let debug work
* Prettier
* Ignore lint errors for now
* Point test at the now skin location
The following additional plugins were being used because of our use of
the older version of Uglify:
```
Using plugins:
check-es2015-constants {"uglify":true}
transform-es2015-arrow-functions {"uglify":true}
transform-es2015-block-scoped-functions {"uglify":true}
transform-es2015-block-scoping {"uglify":true}
transform-es2015-classes {"uglify":true}
transform-es2015-computed-properties {"uglify":true}
transform-es2015-duplicate-keys {"uglify":true}
transform-es2015-for-of {"uglify":true}
transform-es2015-literals {"uglify":true}
transform-es2015-object-super {"uglify":true}
transform-es2015-parameters {"uglify":true}
transform-es2015-shorthand-properties {"uglify":true}
transform-es2015-spread {"uglify":true}
transform-es2015-sticky-regex {"uglify":true}
transform-es2015-template-literals {"uglify":true}
transform-es2015-typeof-symbol {"uglify":true}
transform-es2015-unicode-regex {"uglify":true}
transform-regenerator {"uglify":true}
transform-exponentiation-operator {"uglify":true}
transform-async-to-generator {"uglify":true}
syntax-trailing-function-commas {"uglify":true}
```
