fixed a memory leak

[hansoksendahl]

The library had a subscribe method but no unsubscribe method.

[coveralls]

Pull Request Test Coverage Report for Build 27

• 2 of 2 (100.0%) changed or added relevant lines in 1 file are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage remained the same at 100.0%

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Totals
Change from base Build 22:	0.0%
Covered Lines:	40
Relevant Lines:	40

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💛 - Coveralls

[didierfranc]

Not really a memory leak but unsuscribe could be useful !

[hansoksendahl]

It is most certainly a memory leak. There is an array managed by the library which allows you to add entries to it with no ability to remove them or clear the array. A thank you would suffice.

[shahruz]

@didierfranc are there plans for this to be merged in?