Ability to exclude timelines from location (https://github.com/ExpDev07/coronavirus-tracker-api/issues/89) + some hotfix with boolean parsing of query params.

[ExpDev07]

This introduces the ability to exclude timelines from /v2/locations/:id (#89) by adding ?timelines=0 or ?timelines=false. It will still show timelines by default so not to break existing apps.

Fixes:

• An issue where all values (even false or 0) were regarded as true when parsed to a boolean in the code was also fixed.