add avgRating (#1520)
add avgRating (#1520)

Signed-off-by: Kirill Danshin <13fbd79c3d390e5d6585a21e11ff5ec1970cff0c@guava.by>
theckman/awesome-go,hvnsweeting/awesome-go,sadlil/awesome-go,avelino/awesome-go,Oire/awesome-go,pconcepcion/awesome-go,abhishekgahlot/awesome-go,chrislusf/awesome-go,subodhchhabra/awesome-go,jmelfi/awesome-go