dotfiles in test dir cause a panic

[taigrr]

Prerequisites

• [X ] Can you reproduce the problem?
• [X ] Are you running the latest version?
• [X ] Did you perform a cursory search?

Description

Using latest release on macos, the --dir tests cause the binary to panic because a non-yaml file, .DS_Store, exists in the directory. This also happens if there's a .gitignore or .gitattributes file present.

Steps to Reproduce

1. Create a testing dir
2. add a non-yaml dotfile to the directory
3. test using --dir
4. observe the binary panic

Expected behavior: the binary should skip hidden files

Actual behavior: the binary does not skip hidden files, and panics

Specifications

• Version: 2.5.0
• Platform: All

[taigrr]

thanks to @jscottsf for pointing out this bug to me