feat: used correct datatype for Tags

Signed-off-by: SoXX <soxx@fenpa.ws>

pkg/e621/model/post.go

@@ -84,10 +84,10 @@ type Score struct {
 type Tags struct {
 	General   []string `json:"general"`
 	Artist    []string `json:"artist"`
-	Copyright []interface{} `json:"copyright"`
+	Copyright []string `json:"copyright"`
 	Character []string `json:"character"`
 	Species   []string `json:"species"`
-	Invalid   []interface{} `json:"invalid"`
+	Invalid   []string `json:"invalid"`
 	Meta      []string `json:"meta"`
-	Lore      []interface{} `json:"lore"`
+	Lore      []string `json:"lore"`
 }