Disable version check for devs (#522)

cli/mizu/version/versionCheck.go

@@ -5,6 +5,7 @@ import (
 	"fmt"
 	"io/ioutil"
 	"net/http"
+	"os"
 	"runtime"
 	"strings"
 	"time"
@@ -39,6 +40,10 @@ func CheckVersionCompatibility(apiServerProvider *apiserver.Provider) (bool, err
 }
 
 func CheckNewerVersion(versionChan chan string) {
+	if _, present := os.LookupEnv(mizu.DEVENVVAR); present {
+		versionChan <- ""
+		return
+	}
 	logger.Log.Debugf("Checking for newer version...")
 	start := time.Now()
 	client := github.NewClient(nil)