20191215 code improvements (#790)

* Upgrade godo to latest
* Fix a bunch of issues found by
* Running staticcheck on a codebase for the first time is a sobering experience
* go mod tidy
* More static improvements

Signed-off-by: Chris Cummer <chriscummer@me.com>

modules/gitter/client.go

@@ -54,6 +54,10 @@ var (
 
 func apiRequest(path, apiToken string) (*http.Response, error) {
 	req, err := http.NewRequest("GET", apiBaseURL+path, nil)
+	if err != nil {
+		return nil, err
+	}
+
 	bearer := fmt.Sprintf("Bearer %s", apiToken)
 	req.Header.Add("Authorization", bearer)
 

modules/gitter/widget.go

@@ -97,11 +97,3 @@ func (widget *Widget) content() (string, string, bool) {
 
 	return title, str, true
 }
-
-func (widget *Widget) openMessage() {
-	sel := widget.GetSelected()
-	if sel >= 0 && widget.messages != nil && sel < len(widget.messages) {
-		message := &widget.messages[sel]
-		utils.OpenFile(message.Text)
-	}
-}