Update the `initialize` and `update` actions so that `dependencies` is being checked for `@screenly/edge-apps` as well

[nicomiguelino]

• The current checks in initialize and update actions are fragile.
• Only devDependencies (from package.json) is being checked for @screenly/edge-apps at the moment. If the check returns false, the workflow won't be able to build Edge Apps written in TypeScript.
• Make the checks in those actions more robust.