Cannot display struck or bold characters in diff view

**Describe the bug**
Expected view(`git diff`):

Current view in lazygit:

**To Reproduce**
On `.gitconfig`:
```gitconfig
[delta]
features = traditional

[delta "traditional"]
keep-plus-minus-markers = true
minus-style = syntax dim strike "#001930"
minus-non-emph-style = syntax dim strike "#001930"
minus-emph-style = syntax strike "#005099"
plus-emph-style = auto bold auto
```

On `config.yml`:
```yml
git:
paging:
colorArg: always
pager: delta --paging=never
```

**Desktop (please complete the following information):**
- OS: macOS Catalina
- Lazygit Version: v0.28.2+
- The last commit id if you built project from sources (run : ```git-rev parse HEAD```): b28569a593c9c90bf50740f485bb3711b2c5ad2b