See:
https://david-dm.org/angular-fullstack/angular-fullstack-deps/5.0.0
https://david-dm.org/angular-fullstack/angular-fullstack-deps/5.0.0?type=dev

Overview of the issue

Convert usage of Java's Optional to the Kotlin built-in null safety features.

Motivation for or Use Case

As the bulk of the Java code is now migrated to Kotlin we can start fully migrating to Kotlin using more of its built-in features. This might seem as it should have been done already but it was intentionally left out to ease the process of migration(#85) and m

Is your feature request related to a problem? Please describe.
Use of adaptive cards in the generated connector, new feature as of June 2020

Describe the solution you'd like
As above

Describe alternatives you've considered
There is no alternatives :-)

When a user would like to use yarn, it needs to be installed, even when --skip-install option is used.
I think this check could be moved to the actual install phase, simply throwing a warning like "Yarn is not installed, skipping install. Please install yarn on your machine." is enough.
What do you think, @HaNdTriX ?