run-hooks: Symbol’s value as variable is void: comint-osc-handlers

[Hongyi Zhao]

I installed `comint-mime` with the following configuration:
```emacs-lisp
(use-package comint-mime
  :straight (:host github :type git :repo "astoff/comint-mime"
             :files (:defaults "*.py" "*.sh"))
  :hook ((shell-mode inferior-python-mode) . comint-mime-setup)
  :custom
  (org-format-latex-options '(plist-put org-format-latex-options :scale 1.5))
```
But when I start the python interpreter by `C-c C-p`, the following
message will be triggered:

```
run-hooks: Symbol’s value as variable is void: comint-osc-handlers
Shell native completion is disabled, using fallback
```
Any hints for this problem?

Regards,
HZ