replace deprecated io/ioutil with os and io for cmd

cmd/dependencyverifier/dependencyverifier.go

@@ -20,7 +20,6 @@ import (
 	"bytes"
 	"encoding/json"
 	"fmt"
-	"io/ioutil"
 	"log"
 	"os"
 	"os/exec"
@@ -81,7 +80,7 @@ func runCommand(cmd ...string) (string, error) {
 }
 
 func readFile(path string) (string, error) {
-	content, err := ioutil.ReadFile(path)
+	content, err := os.ReadFile(path)
 	// Convert []byte to string and print to screen
 	return string(content), err
 }