Disable unused-parameter golangci check (#191)

* add lint rule exclusion for unused-parameter

* re-introduce the unused parameters in plugin.go

.golangci.yml

@@ -46,3 +46,6 @@ issues:
       linters:
         - bodyclose
         - scopelint # https://github.com/kyoh86/scopelint/issues/4
+    - linters:
+        - revive
+      text: unused-parameter

server/plugin.go

@@ -21,7 +21,7 @@ type Plugin struct {
 }
 
 // ServeHTTP demonstrates a plugin that handles HTTP requests by greeting the world.
-func (p *Plugin) ServeHTTP(_ *plugin.Context, w http.ResponseWriter, _ *http.Request) {
+func (p *Plugin) ServeHTTP(c *plugin.Context, w http.ResponseWriter, r *http.Request) {
 	fmt.Fprint(w, "Hello, world!")
 }