Makefile: replace the Go linter and apply all their recommendations

Previously, we use golangci-lint as linter.
This linter does not provides any useful recommendation lately and the
development is quite a mess, sometimes its break when using Go tip.

In this changes we replace it with revive, fieldalignment, and shadow;
and fix all of their recommendations.

1 files changed, 1 insertions, 0 deletions

diff --git a/attack_options.go b/attack_options.go
index 417071b..60f5d5a 100644
--- a/attack_options.go
+++ b/attack_options.go
@@ -9,6 +9,7 @@ import (
 	vegeta "github.com/tsenart/vegeta/v12/lib"
 )
 
+// AttackOptions define the options for attacking HTTP endpoint.
 type AttackOptions struct {
 	// Duration define the duration for each attack to be executed,
 	// in seconds.