Added explicit bool attribute type

attribute/generated.go

@@ -139,10 +139,10 @@ func Content(value string) hatmill.Attrib {
 }
 
 // Contenteditable creates a "contenteditable" attribute
-func Contenteditable(value string) hatmill.Attrib {
+func Contenteditable(value bool) hatmill.Attrib {
 	return hatmill.Attrib{
 		Key:   "contenteditable",
-		Value: value,
+		Value: strconv.FormatBool(value),
 	}
 }
 
@@ -239,10 +239,10 @@ func Download(value string) hatmill.Attrib {
 }
 
 // Draggable creates a "draggable" attribute
-func Draggable(value string) hatmill.Attrib {
+func Draggable(value bool) hatmill.Attrib {
 	return hatmill.Attrib{
 		Key:   "draggable",
-		Value: value,
+		Value: strconv.FormatBool(value),
 	}
 }
 
@@ -644,10 +644,10 @@ func Span(value int) hatmill.Attrib {
 }
 
 // Spellcheck creates a "spellcheck" attribute
-func Spellcheck(value string) hatmill.Attrib {
+func Spellcheck(value bool) hatmill.Attrib {
 	return hatmill.Attrib{
 		Key:   "spellcheck",
-		Value: value,
+		Value: strconv.FormatBool(value),
 	}
 }