add new interactive tactics skip, ginduction, exacts
add new interactive tactics skip, ginduction, exacts

johoelzl/lean,rlewis1988/lean,leanprover-community/lean,rlewis1988/lean,avigad/lean,Kha/lean,digama0/lean,digama0/lean,johoelzl/lean,Kha/lean,digama0/lean,johoelzl/lean,avigad/lean,leodemoura/lean,leodemoura/lean,Kha/lean,Kha/lean,rlewis1988/lean,johoelzl/lean,dselsam/lean,rlewis1988/lean,leanprover-community/lean,leanprover/lean,digama0/lean,leodemoura/lean,leanprover/lean,Kha/lean,rlewis1988/lean,leodemoura/lean,avigad/lean,johoelzl/lean,avigad/lean,fpvandoorn/lean,Kha/lean,dselsam/lean,avigad/lean,leodemoura/lean,fpvandoorn/lean,dselsam/lean,leodemoura/lean,leanprover-community/lean,digama0/lean,fpvandoorn/lean,fpvandoorn/lean,digama0/lean,leanprover-community/lean,leanprover-community/lean,rlewis1988/lean,dselsam/lean,leanprover/lean,leanprover/lean,leanprover/lean,dselsam/lean,fpvandoorn/lean,avigad/lean,fpvandoorn/lean,leanprover/lean,leanprover-community/lean,dselsam/lean,johoelzl/lean