Return calendar as default output of nepcal (#78)

Brew formula update for nepcal version v1.2.1

v1.2.0 Correctness checks

Add function to calculate total number of days spanned in current year (

#28)

* Add function to calculate total number of days spanned in the current year

* Create a package variable to be able to mock time in tests

* Fix calculation, current month should be skipped

* Add tests for total days spanned

* Remove comma from test names

* Use underscore naming strategy for dates in test names

* Format code to put related pieces together

* Create a private function to calculate total days spanned

This abstracts away the implementation from TotalDaysSpanned() and we can pass our own value for
time in tests.

fix: Avoid representing BS dates using time package to fix overflows (#…

…24)

Fixes #23 

If a B.S. date (say जेठ 32) is represented as 02/32 (which was the case right now), toTime will (obviously) interpret it as Feb 32 which is an overflow by 32 - 29 = 3 days. So it's reinterpreted by the time package to be March 3 which is interpreted by nepcal to be असार 3.

This is now fixed by adding a separate struct BSDate.

Merge branch 'master' of github.com:srishanbhattarai/nepcal

chore: Change goreleaser brew dir to Formula