Update dependencies (#339)

Notable:
- Typescript v3 -> v4
- Storybook v5 -> v6
  - changed stories from `storiesOf` format to component story format
- Postcss-loader v3 -> v4
- D3 v5 -> v6
12 jobs for dev in 8 minutes and 15 seconds (queued for 3 seconds)
Status Job ID Name Coverage
  Test Build Static
passed #259718
Test_N_Build

00:05:46

passed #259719
Test_N_Build:internal

00:05:45

 
  Build Docker Images
passed #259722
Nginx:Internal-EHK

00:01:38

passed #259723
Nginx:Internal-WP

00:02:06

passed #259720
Nginx:Staging-EHK

00:01:51

passed #259721
Nginx:Staging-WP

00:01:50

 
  Deploy
passed #259727
Internal:EHK-HH

00:00:16

passed #259729
Internal:WP-HH

00:00:15

passed #259728
Internal:WP-HX

00:00:13

passed #259724
Staging:EHK-HH

00:00:13

passed #259726
Staging:WP-HH

00:00:15

passed #259725
Staging:WP-HX

00:00:14