Verify converted code by kotlinc

[bashor]

Ideally, it should be an additional check inside tests.
Another possible solution is marking testData as source set.

[epabst]

I'm actively working on this, including fixing the redeclarations, etc.

[epabst]

I have a fix for this that makes testData into a source set, (including fixing ALL compile errors!), but it is blocked by my other pull requests:

1. Include "export class ..." in resulting Kotlin even outside of a module #94 Include "export class ..." in resulting Kotlin even outside of a module
2. Handle union of string values #96 Handle union of string values
3. Don't fully qualify reference to types when not needed #98 Don't fully qualify reference to types when not needed
4. Upgrade to Gradle 4.10.2 #120 Upgrade to Gradle 4.10.2
5. Fix compile errors with generic optional methods #112 Fix compile errors with generic optional methods
6. Specify "overrides" for a generic function when needed #99 Specify "overrides" for a generic function when needed
7. Support abstract classes, funs, and properties and access modifiers #104 Support abstract classes, funs, and properties and access modifiers
8. Fix error "External class constructor cannot have a property parameter" #118 Fix error "External class constructor cannot have a property parameter"
9. Don't specify external for extension functions and variables #121 Don't specify external for extension functions and variables
10. Basic handling of typeof TypeQuery #93 Handle a typeof TypeQuery (unanswered question)
11. Fix overriding of equals, hashCode, and toString to always compile #107 Fix overriding of equals, hashCode, and toString to always compile

[Schahen]

ts2kt is obsolete, use https://github.com/Kotlin/dukat instead and there we do have tests for compilation phase