First Pull Request

Rule: Modifier order arturbosch/detekt

`private lateinit var` vs. `lateinit private var` Both are valid in Kotlin, but I'd like the ability to enforce one.

Created - 2 comments - easy feature formatting

Rule: Safe cast instead of if-else-null arturbosch/detekt

Instead of writing: ```kotlin if (element is KtElement) element else null ``` we can write ```kotlin element as? KtElement ```

Created - 5 comments - easy feature formatting

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