Fix data for 3 month and 1 month graphs

[BhavyaCodes]

Currently 3 months data is calculated from current date till current date - 90 days. but since covid19india has stopped supporting their api, only data till 31st October 2021 is available.

Changes that need to be made is last 3 months data should be shown for last 90 days with last day being 31st october.
Same thing for 1 month with last day being 31st october

[swaroopRajwal]

I've solved this bug by passing 31st october 2021 (the so called current date) to the Date constructor you call to get the current date

for more information
#37