feat: migrating flow to typescript (#47)

This PR convert the code base to Typescript, the changes are the following:

- migrate code base to Typescript (3.4.x)
- enable `eslint` and `@typescript-eslint/eslint-plugin` (warnings still need to be addressed in future pull request
- update relevant dependencies for this PR (linting, etc)
- enable `bundlezise` (it was disabled for some reason)

* refactor: refactoring to typescript

* refactor: migrating to typescript

* refactor: applied feedbacks

* fix: fixed conflicts

* refactored: changed registry

* refactor: updated registry & removed unnecessary lib

* fix: fixed registry ur

* fix: fixed page load

* refactor: refactored footer wip

* refactor: converting to ts..wip

* refactor: converting to ts. wip

* refactor: converting to ts. wip

* refactor: converting to ts

* refactor: converting to ts

* fix: fixed load errors

* refactor: converted files to ts

* refactor: removed flow from tests

* fix: removed transpiled files

* refactor: added ts-ignore

* fix: fixed errors

* fix: fixed types

* fix: fixing jest import -.-

* fix: fixing lint errors

* fix: fixing lint errors

* fix: fixed lint errors

* refactor: removed unnecessary tsconfig's config

* fix: fixing errors

* fix: fixed warning

* fix: fixed test

* refactor: wip

* refactor: wip

* refactor: wip

* fix: fixing tests: wip

* wip

* wip

* fix: fixed search test

* wip

* fix: fixing lint errors

* fix: re-added stylelint

* refactor: updated stylelint script

* fix: fixed: 'styles.js'  were found.

* fix: fixed Search tests

* chore: enable eslint

eslint needs expecitely to know which file has to lint, by default is JS, in this case we need also ts,tsx files eslint . --ext .js,.ts

* chore: vcode eslint settings

* chore: restore eslint previous conf

* chore: clean jest config

* chore: fix eslint warnings

* chore: eslint errors cleared

chore: clean warnings

chore: remove github actions test phases

chore: remove dupe rule

* chore: update handler name

* chore: restore logo from img to url css prop

- loading images with css is more performant than using img html tags, switching this might be a breaking change
- restore no-empty-source seems the linting do not accept false
- update snapshots
- remove @material-ui/styles

* chore: update stylelint linting

* chore: update stylelint linting

* chore: fix a mistake on move tabs to a function

* chore: eanble bundlezie

* chore: use default_executor in circleci

* chore: update readme

README.md

@@ -6,14 +6,15 @@
 [Verdaccio](https://verdaccio.org/) UI is a [theme plugin](https://verdaccio.org/docs/en/dev-plugins#theme-plugin) build in React, Flow and Emotion. It uses Jest and Enzyme for Unit testing.
 
 
-[![verdaccio (latest)](https://img.shields.io/npm/v/@verdaccio/ui-theme/latest.svg)](https://www.npmjs.com/package/verdaccio)
+[![verdaccio (latest)](https://img.shields.io/npm/v/@verdaccio/ui-theme/latest.svg)](https://www.npmjs.com/package/@verdaccio/ui-theme)
 [![docker pulls](https://img.shields.io/docker/pulls/verdaccio/verdaccio.svg?maxAge=43200)](https://verdaccio.org/docs/en/docker.html)
 [![backers](https://opencollective.com/verdaccio/tiers/backer/badge.svg?label=Backer&color=brightgreen)](https://opencollective.com/verdaccio)
 [![stackshare](https://img.shields.io/badge/Follow%20on-StackShare-blue.svg?logo=stackshare&style=flat)](https://stackshare.io/verdaccio)
 [![discord](https://img.shields.io/discord/388674437219745793.svg)](http://chat.verdaccio.org/)
-[![node](https://img.shields.io/node/v/@verdaccio/ui-theme/latest.svg)](https://www.npmjs.com/package/verdaccio)
+[![node](https://img.shields.io/node/v/@verdaccio/ui-theme/latest.svg)](https://www.npmjs.com/package/@verdaccio/ui-theme)
 ![MIT](https://img.shields.io/github/license/mashape/apistatus.svg)
 [![Crowdin](https://d322cqt584bo4o.cloudfront.net/verdaccio/localized.svg)](https://crowdin.com/project/verdaccio)
+[![codecov](https://codecov.io/gh/verdaccio/ui/branch/master/graph/badge.svg)](https://codecov.io/gh/verdaccio/ui)
 
 
 [![Twitter followers](https://img.shields.io/twitter/follow/verdaccio_npm.svg?style=social&label=Follow)](https://twitter.com/verdaccio_npm)
@@ -21,9 +22,9 @@
 
 ## Contributing
 
-We use `>=yarn@1.13.0`, keep on mind we use lock file. 
+We use `>=yarn@1.13.0`, keep on mind we use lock file.
 
-For development run the following command, it will execute `webpack` and `verdaccio` to 
+For development run the following command, it will execute `webpack` and `verdaccio` to
 
 ```
 yarn dev