refactor: move from io/ioutil to io and os packages (#1068)

* refactor: move from io/ioutil to io and os packages

The io/ioutil package has been deprecated as of Go 1.16, see
https://golang.org/doc/go1.16#ioutil. This commit replaces the existing
io/ioutil functions with their new definitions in io and os packages.

Signed-off-by: Eng Zer Jun <engzerjun@gmail.com>

* build: update snapcraft `go-channel` to 1.17

Signed-off-by: Eng Zer Jun <engzerjun@gmail.com>

pkg/yqlib/file_utils.go

@@ -3,7 +3,6 @@ package yqlib
 import (
 	"fmt"
 	"io"
-	"io/ioutil"
 	"os"
 )
 
@@ -77,7 +76,7 @@ func createTempFile() (*os.File, error) {
 		return nil, err
 	}
 
-	file, err := ioutil.TempFile("", "temp")
+	file, err := os.CreateTemp("", "temp")
 	if err != nil {
 		return nil, err
 	}