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

src/components/NotFound/NotFound.tsx

@@ -0,0 +1,55 @@
+import ListItem from '@material-ui/core/ListItem';
+import Typography from '@material-ui/core/Typography';
+import withWidth, { isWidthUp } from '@material-ui/core/withWidth';
+import React from 'react';
+import { RouteComponentProps, withRouter } from 'react-router-dom';
+
+import PackageImg from './img/package.svg';
+import { Card, EmptyPackage, Heading, Inner, List, Wrapper } from './styles';
+
+export const NOT_FOUND_TEXT = "Sorry, we couldn't find it...";
+
+export type NotFoundProps = RouteComponentProps & { width: any; history: any };
+
+const NotFound: React.FC<NotFoundProps> = ({ history, width }) => {
+  const handleGoTo = (to: string) => () => {
+    history.push(to);
+  };
+
+  const handleGoBack = () => () => {
+    history.goBack();
+  };
+
+  const renderList = () => (
+    <List>
+      <ListItem button={true} divider={true} onClick={handleGoTo('/')}>
+        {'Home'}
+      </ListItem>
+      <ListItem button={true} divider={true} onClick={handleGoBack()}>
+        {'Back'}
+      </ListItem>
+    </List>
+  );
+
+  const renderSubTitle = () => (
+    <Typography variant="subtitle1">
+      <div>{"The page you're looking for doesn't exist."}</div>
+      <div>{'Perhaps these links will help find what you are looking for:'}</div>
+    </Typography>
+  );
+
+  return (
+    <Wrapper>
+      <Inner>
+        <EmptyPackage alt="404 - Page not found" src={PackageImg} />
+        <Heading className="not-found-text" variant={isWidthUp('sm', width) ? 'h2' : 'h4'}>
+          {NOT_FOUND_TEXT}
+        </Heading>
+        {renderSubTitle()}
+        <Card>{renderList()}</Card>
+      </Inner>
+    </Wrapper>
+  );
+};
+
+export default withRouter(withWidth()(NotFound));