Deserialization crashes for 64bit Integer DataType

[cbalster]

Description

In https://github.com/RHEAGROUP/reqifsharp/blob/development/ReqIFSharp/Datatype/DatatypeDefinitionInteger.cs it is assumed that Integers may only ever be 32 bit. E.g.:
https://github.com/RHEAGROUP/reqifsharp/blob/d96203280ded07de2750971d0ac61f9652e2ba65/ReqIFSharp/Datatype/DatatypeDefinitionInteger.cs#L56
https://github.com/RHEAGROUP/reqifsharp/blob/d96203280ded07de2750971d0ac61f9652e2ba65/ReqIFSharp/Datatype/DatatypeDefinitionInteger.cs#L76
This might not necessarily be true. For example Polarion uses 64bit integers by default, thus resulting in the min/max in the DataType definition to be +/- 9.223.372.036.854.775.807. This leads to a crash while deserializing.
As far as I can tell the ReqIF and xml specification do not make any statements about the maximum size allowed.

Steps to Reproduce

Modify an existing .reqif file and adjust the min/max values of an integer DataType definition to use values bigger than a 32 bit int can hold and deserialize it.

[samatstariongroup]

@cbalster pull request is ready, waiting for someone on the team to review it, then we'll make a new release

[samatstariongroup]

@cbalster we just issued a new nuget which should solve this issue, version 2.0.0 https://www.nuget.org/packages/ReqIFSharp/2.0.0

If you can, would be great to learn a bit more about the project(s) you are using this library for

[cbalster]

Wow, that was quick! Thank you for that and especially for open sourcing the library in the first place.

[samatstariongroup]

you are welcome

[cbalster]

@samatrhea Sorry, missed your question before: I'm using it implicitly via the hoReverse tool for enterprise architect linked above, to quickly evaluate/showcase different possible process options.

[samatstariongroup]

@cbalster working on a web based reqif viewer, check it out here: https://viewer.reqifsharp.org/ and let us know what you think!