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

jest/setup.ts

@@ -0,0 +1,25 @@
+/**
+ * Setup configuration for Jest
+ * This file includes global settings for the JEST environment.
+ */
+import 'raf/polyfill';
+import { configure } from 'enzyme';
+import Adapter from 'enzyme-adapter-react-16';
+
+// @ts-ignore : Only a void function can be called with the 'new' keyword
+configure({ adapter: new Adapter() });
+
+// @ts-ignore : Property '__APP_VERSION__' does not exist on type 'Global'.
+global.__APP_VERSION__ = '1.0.0';
+// @ts-ignore : Property '__VERDACCIO_BASENAME_UI_OPTIONS' does not exist on type 'Global'.
+global.__VERDACCIO_BASENAME_UI_OPTIONS = {};
+
+// mocking few DOM methods
+// @ts-ignore : Property 'document' does not exist on type 'Global'.
+if (global.document) {
+  // @ts-ignore : Type 'Mock<{ selectNodeContents: () => void; }, []>' is not assignable to type '() => Range'.
+  document.createRange = jest.fn((): void => ({
+    selectNodeContents: (): void => {},
+  }));
+  document.execCommand = jest.fn();
+}