Added gosimple

- Get gosimple package
- Updated staticcheck's URL
- Moved build and above checks in `before_script` section to fail fast
- Fixed reports from gosimple

server/server_test.go

@@ -308,7 +308,7 @@ func TestWriteDeadline(t *testing.T) {
 			t.Fatalf("Error on publish: %v", err)
 		}
 	}
-	dur := time.Now().Sub(start)
+	dur := time.Since(start)
 	// user more than the write deadline to account for calls
 	// overhead, running with -race, etc...
 	if dur > 100*time.Millisecond {

server/sublist.go

@@ -636,8 +636,5 @@ func matchLiteral(literal, subject string) bool {
 		li++
 	}
 	// Make sure we have processed all of the literal's chars..
-	if li < ll {
-		return false
-	}
-	return true
+	return li >= ll
 }