Caskaydia Cove: some of symbols are not centered correctly
#### 🗹 Requirements

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#### 🎯 Subject of the issue

Experienced behavior:
Some of symbols are not centered correctly.

Expected behavior:
All symbols are centered.

Example symbols:
"🌤️" "🌕"

Resolves: qtile/qtile#4062

#### 🔧 Your Setup

- _Which font are you using (e.g. `Anonymice Powerline Nerd Font Complete.ttf`)?_
   -  Caskaydia Cove Nerd Font Complete (Bold).otf
- _Where did you get the file from (download link, self patched, source downloaded from link...)_
   - I tried files from website, latest release, master branch.
- _Which terminal emulator are you using (e.g. `iterm2`, `urxvt`, `gnome`, `konsole`)?_
   - The issue appears in [qtile](github.com/qtile/qtile), not in terminal emulator.
- _Are you using OS X, Linux or Windows? And which specific version or distribution?_
   - Linux

#### ★ Screenshots (Optional)

![](https://i.imgur.com/ECpjSL2.png)

![](https://i.imgur.com/O7sR33t.png)

