Add time range parameter to mutations-by-lineage endpoint

[joshuailevy]

Rather than looking at mutation frequency information from the entire pandemic, we're often only interested in recent sequencing (say, within the last 6 months).

Handler

Mutations by lineage endpoint Example API Call

Expected behavior

• Similar to the query described in #54, we will specify a GET query including a min and max date (as optional parameters). Query would look like https://api.outbreak.info/genomics/mutations-by-lineage?mutations=S:E484K&location_id=USA&datemin=2022-05-15&datemax=2022-07-21
• If no datemax is specified, include data up to most recent data
• If no datemin is specified, include data up to datemax (if specified). If neither min nor max is specified, the command should run as it currently does.

Expected Outcome

User should get a similar outcome to the mutations-by-lineage endpoint, except now only including data from sequences collected in the specified time period.

Related docs

https://github.com/outbreak-info/outbreak.api/blob/master/web/handlers/genomics/docs.md

[flaneuse]

would recommend adding a datemin and datemax parameter for maximum flexibility like in #54