Automate dependencies upgrades and include security scan

[malaskowski]

Is your feature request related to a problem? Please describe.
Knot.x Dependencies groups most of the dependencies versions that whole Knot.x ecosystem is using. I'd like to automate those dependencies upgrades, together with basic security scan and CI building whole Knot.x stack in order to check for any regression regarding the upgraded dependency.

Describe the solution you'd like
Implement a dependency upgrade mechanism that will automate upgrades e.g. in a form of PRs so that CI can build after the change.

Describe alternatives you've considered
Manually check for dependencies upgrade every some period of time.

Additional context
Dependabot seems to be a nice solution, but at the moment of raising this issue, there is no support for Gradle Kotlin DSL.

It may occur that it is necessary to move dependencies versions from gradle.properties to build.gradle.kts to make dependabot work.

[tomaszmichalak]

I reconfigured dependabot and it looks that no error appears:
https://app.dependabot.com/accounts/Knotx/update-logs/68005305

However, no PR created.

[tomaszmichalak]

@malaskowski maybe we need to configure it for BOM project: https://dependabot.com/docs/config-file/