Remove unnecessary files from packagist archive

[Tofandel]

Questions	Answers
Description?	Removed test and .github folder from composer archive
Type?	improvement
BC breaks?	no
Deprecations?	no
Fixed ticket?	Fixes #{issue URL here}, Fixes #{another issue URL here}
How to test?	Simply check that when installing this package with composer, the test and .github folder are not included anymore

[leemyongpakvn]

@Tofandel & @tleon I think we need creating an issue for this PR and use it for other native modules.