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/Engines/Engines.tsx

@@ -0,0 +1,73 @@
+import React, { Component, ReactElement } from 'react';
+
+import Avatar from '@material-ui/core/Avatar';
+import Grid from '@material-ui/core/Grid';
+import List from '@material-ui/core/List';
+import ListItemText from '@material-ui/core/ListItemText';
+
+import { DetailContextConsumer, VersionPageConsumerProps } from '../../pages/version/Version';
+import { Heading, EngineListItem } from './styles';
+// @ts-ignore
+import node from './img/node.png';
+import npm from '../Install/img/npm.svg';
+
+const ICONS = {
+  'node-JS': <Avatar src={node} />,
+  'NPM-version': <Avatar src={npm} />,
+};
+
+class Engine extends Component {
+  public render(): ReactElement<HTMLElement> {
+    return (
+      <DetailContextConsumer>
+        {context => {
+          return this.renderEngine(context as VersionPageConsumerProps);
+        }}
+      </DetailContextConsumer>
+    );
+  }
+
+  private renderEngine = ({ packageMeta }): ReactElement<HTMLElement> | null => {
+    const { engines } = packageMeta.latest;
+    if (!engines) {
+      return null;
+    }
+
+    const engineDict = {
+      'node-JS': engines.node,
+      'NPM-version': engines.npm,
+    };
+
+    const accumulator: React.ReactNode[] = [];
+    const items = Object.keys(engineDict).reduce((markup, text, key) => {
+      const heading = engineDict[text];
+      if (heading) {
+        markup.push(
+          <Grid item={true} key={key} xs={6}>
+            {this.renderListItems(heading, text)}
+          </Grid>
+        );
+      }
+      return markup;
+    }, accumulator);
+
+    if (items.length < 1) {
+      return null;
+    }
+
+    return <Grid container={true}>{items}</Grid>;
+  };
+
+  private renderListItems = (heading, text) => {
+    return (
+      <List subheader={<Heading variant={'subheading'}>{text.split('-').join(' ')}</Heading>}>
+        <EngineListItem>
+          {ICONS[text]}
+          <ListItemText primary={heading} />
+        </EngineListItem>
+      </List>
+    );
+  };
+}
+
+export default Engine;

src/components/Engines/index.ts

@@ -0,0 +1 @@
+export { default } from './Engines';

src/components/Engines/styles.ts

@@ -0,0 +1,16 @@
+import styled from 'react-emotion';
+import ListItem from '@material-ui/core/ListItem';
+import Typography from '@material-ui/core/Typography';
+
+export const Heading = styled(Typography)`
+  && {
+    font-weight: 700;
+    text-transform: capitalize;
+  }
+`;
+
+export const EngineListItem = styled(ListItem)`
+  && {
+    padding-left: 0;
+  }
+`;