fix: add yq prior to 4.18.* support

[realFrogboy]

Hi, thank you for your wonderful plugin!

I've tried to install it on my machine and received the following error message:

Error: unknown command ".icons.\"vim\"" for "yq"
Run 'yq --help' for usage.
bash: [: bin/defaults.yml: integer expression expected
Error: unknown command ".config.show-name" for "yq"
Run 'yq --help' for usage.

The source of the issue was that yq on my system has 4.2.0 version and according to this discussion mikefarah/yq#1158 (comment) prior to 4.18.x eval word must be specified before the actual commands.

I've added a check of the yq version and inserted eval if it's actually required.

[joshmedeski]

Thanks for looking into this and writing up backwards compatability.

yq version 4.17 is almost 3 years old right now. So, rather than adding additional complexity to the project, are you able to upgrade yq on your machine? To my knowledge it's not something included on many operating systems so it seems reasonable to require the dependency be ya v4.18 or highter.

Let me know your thoughts, thanks.

[joshmedeski]

@realFrogboy you've got merge conflicts