Address compile warnings

[jcs090218]

I'm getting these warnings when installing this package. Maybe you want to fix it?

Thanks!

In end of data:
gdscript-hydra.el:157:1:Warning: the function `gdscript-hydra--menu/body' is
    not known to be defined.

In gdscript-info-dedenter-opening-block-positions:
gdscript-indent-and-nav.el:755:24:Warning: `seq-contains' is an obsolete
    function (as of 27.1); use `seq-contains-p' instead.

In gdscript-project--select-scene:
gdscript-project.el:52:111:Warning: `format' called with 1 args to fill 0
    format field(s)

In end of data:
gdscript-project.el:115:1:Warning: the function `ag-project-regexp' is not
    known to be defined.

[NathanLovato]

Weird, makem.sh test doesn't report any error.

seq-contains is normal, we support Emacs 26.3, where seq-contains-p isn't available if I remember right.

The others definitely could use some cleanup.

[jcs090218]

I am using Emacs 27.1 on Windows.

[NathanLovato]

You were fast! While you were commenting, I removed the initial comment and wrote another.

[NathanLovato]

After running tests locally, we should keep in mind that some functions will always cause linting errors but those are fine, like functions relying on ag or projectile. In the code, we check that the user has the optional package before calling into it.

So the lint warnings to address are these two:

In end of data:
gdscript-hydra.el:157:1:Warning: the function `gdscript-hydra--menu/body' is
    not known to be defined.

In gdscript-project--select-scene:
gdscript-project.el:52:111:Warning: `format' called with 1 args to fill 0
    format field(s)

[jcs090218]

I have added the CI in #113. You should able to see warnings here.

[jcs090218]

Just to post some information about makem.sh.

Weird, makem.sh test doesn't report any error.

By read the documentation from their README, it seems like it would only test the package with different linters (package-lint, elsa, etc). Some errors/warnings would only appear in packaging or installing stage, so it's better if you use Cask/Eask in this scenario.

Hope the information helps! :)