add InstanceCreationDisallowerTrait
update badges
Merge pull request #6 from keradus/badges

update badges
Merge pull request #2 from keradus/InstanceCreationDisallowerTrait

add InstanceCreationDisallowerTrait
update composer branch-alias
add InnerClassCacheTrait
Merge pull request #5 from keradus/InnerClassCacheTrait

add InnerClassCacheTrait
add SingletonTrait
Merge pull request #7 from keradus/SingletonTrait

add SingletonTrait
add PropertyTrait