Support .gradle.kts project

[wakwak3125]

Checklist

• I've run bundle exec rspec from the root directory to see all new and existing tests pass
• I've followed the fastlane code style and run bundle exec rubocop -a to ensure the code style is valid
• I've read the Contribution Guidelines
• I've updated the documentation if necessary.

Motivation and Context

Currently, we can write Gradle file with Kotlin that file name with .gradle.kts.
But the current version of Fastlane does not support this file type.
To detect the project platform, require the setup.rb should know .gradle.kts is also an Android project.

https://github.com/gradle/kotlin-dsl

Description

I add the line that .kts is also an Android project.
And I test with my .gradle.kts project.

[googlebot]

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[wakwak3125]

CLA signed!

[googlebot]

CLAs look good, thanks!

[janpio]

Can you explain a bit what a .gradle.kts actually is? Just a normal .gradle with a different syntax?

[wakwak3125]

@janpio
It write with Kotlin.
The normal gradle file write with groovy.

[janpio]

Thanks @wakwak3125! Sorry it took so long to merge.

[fastlane-bot]

Hey @wakwak3125 👋

Thank you for your contribution to fastlane and congrats on getting this pull request merged 🎉
The code change now lives in the master branch, however it wasn't released to RubyGems yet.
We usually ship about once a week, and your PR will be included in the next one.

Please let us know if this change requires an immediate release by adding a comment here 👍
We'll notify you once we shipped a new release with your changes 🚀

[fastlane-bot]

Congratulations! 🎉 This was released as part of fastlane 2.118.0 🚀