Bump golangci-lint to v1.24.0, linter fixes and general code improvements (#478)

* Bump golangci-lint version, update Go version deps and generic code improvements

* Fix wesbocket resp nil check and zip closures

* Update pprof path

common/common.go

@@ -264,22 +264,19 @@ func ExtractPort(host string) int {
 
 // OutputCSV dumps data into a file as comma-separated values
 func OutputCSV(filePath string, data [][]string) error {
-	_, err := ioutil.ReadFile(filePath)
-	if err != nil {
-		errTwo := ioutil.WriteFile(filePath, nil, 0770)
-		if errTwo != nil {
-			return errTwo
-		}
-	}
-
 	file, err := os.Create(filePath)
 	if err != nil {
 		return err
 	}
-	defer file.Close()
 
 	writer := csv.NewWriter(file)
-	return writer.WriteAll(data)
+	if err = writer.WriteAll(data); err != nil {
+		file.Close()
+		return err
+	}
+
+	file.Close()
+	return nil
 }
 
 // GetURIPath returns the path of a URL given a URI