removed dependance on external library

Signed-off-by: Michael <michael.lindman@gmail.com>

.gitignore

@@ -1 +1,2 @@
+currency
 go.sum

go.mod

@@ -1,5 +1,3 @@
 module git.0cd.xyz/michael/currency
 
 go 1.17
-
-require git.0cd.xyz/michael/toolbox v0.0.0-20211024232522-b1a517857097 // indirect

main.go

@@ -3,18 +3,38 @@ package main
 import (
 	"encoding/json"
 	"fmt"
+	"io"
 	"log"
+	"net/http"
 	"os"
 	"strconv"
-
-	"git.0cd.xyz/michael/toolbox/req"
 )
 
 const url = "https://cdn.jsdelivr.net/gh/fawazahmed0/currency-api@1/latest/currencies/"
 
+func request(url string) ([]byte, error) {
+	req, err := http.NewRequest(http.MethodGet, url, nil)
+	if err != nil {
+		return nil, err
+	}
+	resp, err := http.DefaultClient.Do(req)
+	if err != nil {
+		return nil, err
+	}
+	body, err := io.ReadAll(resp.Body)
+	if err != nil {
+		return nil, err
+	}
+	defer resp.Body.Close()
+	if resp.StatusCode == http.StatusOK {
+		return body, nil
+	}
+	return nil, fmt.Errorf("request: %s - %d %s", url, resp.StatusCode, http.StatusText(resp.StatusCode))
+}
+
 func main() {
 	from, to, value := ui()
-	body, _, err := req.Get(url+from+"/"+to+".json", nil)
+	body, err := request(url + from + "/" + to + ".json")
 	if err != nil {
 		log.Fatal(err)
 	}