Update scamper package to the latest version

[robertodauria]

This PR upgrades scamper to the latest version available (https://www.caida.org/catalog/software/scamper/).

It was tested with docker-compose up --build and by generating some TCP traffic in the container, please let me know if there are more specific testing steps to follow.

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This change is 

[coveralls]

Pull Request Test Coverage Report for Build 570

• 0 of 0 changed or added relevant lines in 0 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage remained the same at 95.983%

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Totals
Change from base Build 567:	0.0%
Covered Lines:	669
Relevant Lines:	697

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💛 - Coveralls