[bug] type parameter names are stripped erroneously leading to broken code

[bradzacher]

Input:

declare abstract class DefinitionBase<TType extends string> {}

Expected:

declare abstract class DefinitionBase<TType extends string> {}

Actual:

declare abstract class DefinitionBase< extends string> {}

[antoniosZ]

This appears to be a regression in 0.10.0 and does not happen in 0.9.0

[michkot]

Bug seems to be still present in v 0.11.0

Sample input and output: repro.zip

Target used: 4.2

[michkot]

combination of TS 4.9.3 and this 0.11.0 seems to work correctly - I assume one must always pair "correct" TS and downlevel-dts versions (although its not entirely clear to me what the "correct" version is for the past releases)