fix(src/library/tactic/simplify): relaxed_whnf when checking if fn is dependent
fix(src/library/tactic/simplify): relaxed_whnf when checking if fn is dependent

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