* update: removing redundant go-source tag

* fix: removing /.idea and adding dir to gitignore

* fix: removing /.idea and removing branch field from from templateData

* fix: pkgHndler defaultBranch rem revert

* fix: minor typo

* fix: removing assertion of template responses

* fix: tabs

* Update handler_test.go

* Update handler_test.go

* Update handler_test.go

---------

Co-authored-by: Anuragkillswitch <70265851+Anuragkillswitch@users.noreply.github.com>

This simplifies the Makefile significantly,
borrowing patterns we've used in other projects.
Namely:

- Set GOBIN to a bin subdirectory
  so that we can `go install` dependencies into it.
- Use a shared TEST_FLAGS for `make test` and `make cover`.
  Without this, we're not running with data race detection in CI.
- Build lint step out of separate golint and staticcheck steps.
  In the future, a gofmt step may also be added.
- Move tools dependencies into an unpublished subpackage.

Note: I didn't mess with the 'clean' and 'run' targets
at the bottom of the file even though they're not necessary
to avoid a merge conflict with #60.