San Mateo data is broken

[thuongho]

Describe the bug
On Stats page, the data for San Mateo seems to be broken. It only show data from 9/23.

To Reproduce
Steps to reproduce the behavior:

1. Go to 'Stats'
2. Click on 'Show Data For:' County Selector dropdown and select 'San Mateo'
3. View the cases and deaths charts

Expected behavior
San Mateo should display current data like all the other counties.

Screenshots

Desktop (please complete the following information):

• OS: all
• Browser: chrome, safari
• Version: latest

Smartphone (please complete the following information):

• Device: iphone
• OS: latest
• Browser chrome
• Version: latest

Additional context
Add any other context about the problem here.

[yetesh]

I'm working on this. Seems we filter our 0 cases in formatGraph.ts and San Mateo County data has 0 cases for month of December. The chartData props passed to TimeBarChar from Stats is an array of length 0 and hence TimeBarChar fails to load due to NPE.

[yetesh]

fixed by @kbrdsk #791