Fatal on windows when Nimble clones to dir ending with dot
```
 Installing stb_image@>= 2.
Downloading https://gitlab.com/define-private-public/stb_image-Nim.git using git
       Tip: 66 messages have been suppressed, use --verbose to show them.
     Error: Execution failed with exit code 128
        ... Command: git clone --recursive --depth 1 -b 2.5 https://gitlab.com/define-private-public/stb_image-Nim.git C:\
Users\morfe\AppData\Local\Temp\nimble_19748\gitlabcom_defineprivatepublicstbimageNimgit_2.
        ... Output: fatal: could not create work tree dir 'C:\Users\morfe\AppData\Local\Temp\nimble_19748\gitlabcom_define
privatepublicstbimageNimgit_2.': Invalid argument
```

This is because of https://github.com/dom96/typography/blob/a87b64f328fa0b1e50110e26ec2c14d655ec1f3f/typography.nimble#L16