Changing encoding so it doesn't break on emoji

main.py

@@ -24,7 +24,7 @@ class TextLine:
             o = "{}: {}".format(self.username, self.message.text())
         self.textarea.append(o)
         if self.logfile != "":
-            with open(self.logfile, "a") as file:
+            with open(self.logfile, "a", encoding="utf8") as file:
                 file.write(o + "\n")
         self.message.clear()