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/hackernews/client.go

@@ -52,6 +52,9 @@ var (
 
 func apiRequest(path string) (*http.Response, error) {
 	req, err := http.NewRequest("GET", apiEndpoint+path+".json", nil)
+	if err != nil {
+		return nil, err
+	}
 
 	httpClient := &http.Client{}
 	resp, err := httpClient.Do(req)

modules/hackernews/widget.go

@@ -77,13 +77,12 @@ func (widget *Widget) content() (string, string, bool) {
 		return title, widget.err.Error(), true
 	}
 
-	stories := widget.stories
-	if stories == nil || len(stories) == 0 {
+	if len(widget.stories) == 0 {
 		return title, "No stories to display", false
 	}
-	var str string
 
-	for idx, story := range stories {
+	var str string
+	for idx, story := range widget.stories {
 		u, _ := url.Parse(story.URL)
 
 		row := fmt.Sprintf(