Add Month over Month

[sarahfossheim]

Related to: #1002

Included

• Calculate difference between previous and next month
• Show the month over month value, if configured in the techreport.json file
• Style the month over month value, based on configuration
  • Up arrow for positive change, green if positive is good, red if positive change is bad
  • Down arrow for negative change, red if negative is bad, green if negative change is good
  • Line and gray color for 0% change

Supported for:

• One technology
  • Summary cards on top of the page
  • Metric summary cards (eg. performance, lighthouse, etc)
  • Mobile/Desktop breakdown on the time series
  • Table alternatives under the time series
• Multiple technologies
  • Summary table
  • Mobile/Desktop breakdown on the time series

Screenshots

Table alts

Summary cards for metrics

General summary