Reverse the order of bib entries

[JinraeKim]

Related to #36.

What should I do to reverse the order of the OrderedDict of bib entries?

For example,

julia> bib = Bibliography.import_bibtex(joinpath("references", file * ".bib"))
OrderedCollections.OrderedDict{String, BibInternal.Entry} with 4 entries:
  "kimNeuralNetworkBasedPathReplanning2021"         => Entry(Access("10.1109/ACCESS.2021.3083734", "", "https://ieeexplore.ieee.org/document/9440908"), BibInternal.Name[Name("", "Kim", "", "Jinrae", ""), Name("", "Lee", "", "Suwon", ""), Name("", "Lee", "", "Sangmin", ""), Name("…
  "kimPartiallyConvexNeuralNetworks_in_preparation" => Entry(Access("", "", ""), BibInternal.Name[Name("", "Kim", "", "Jinrae", ""), Name("", "Kim", "", "Youdan", "")], "", Date("", "", "2099"), BibInternal.Name[], Eprint("", "", ""), "kimPartiallyConvexNeuralNetworks_in_preparat…
  "kimFieldofViewConstrainedImpactAngle2021"        => Entry(Access("10.1177/0954410020942010", "", "http://journals.sagepub.com/doi/10.1177/0954410020942010"), BibInternal.Name[Name("", "Kim", "", "Jinrae", ""), Name("", "Cho", "", "Namhoon", ""), Name("", "Kim", "", "Youdan", "…
  "choWindCompensationFramework2020a"               => Entry(Access("10.1109/TAES.2019.2920219", "", "https://ieeexplore.ieee.org/document/8727399/"), BibInternal.Name[Name("", "Cho", "", "Namhoon", ""), Name("", "Lee", "", "Suwon", ""), Name("", "Kim", "", "Jinrae", ""), Name(""…

julia> sort_bibliography!(bib, :y)
OrderedCollections.OrderedDict{String, BibInternal.Entry} with 4 entries:
  "choWindCompensationFramework2020a"               => Entry(Access("10.1109/TAES.2019.2920219", "", "https://ieeexplore.ieee.org/document/8727399/"), BibInternal.Name[Name("", "Cho", "", "Namhoon", ""), Name("", "Lee", "", "Suwon", ""), Name("", "Kim", "", "Jinrae", ""), Name(""…
  "kimNeuralNetworkBasedPathReplanning2021"         => Entry(Access("10.1109/ACCESS.2021.3083734", "", "https://ieeexplore.ieee.org/document/9440908"), BibInternal.Name[Name("", "Kim", "", "Jinrae", ""), Name("", "Lee", "", "Suwon", ""), Name("", "Lee", "", "Sangmin", ""), Name("…
  "kimFieldofViewConstrainedImpactAngle2021"        => Entry(Access("10.1177/0954410020942010", "", "http://journals.sagepub.com/doi/10.1177/0954410020942010"), BibInternal.Name[Name("", "Kim", "", "Jinrae", ""), Name("", "Cho", "", "Namhoon", ""), Name("", "Kim", "", "Youdan", "…
  "kimPartiallyConvexNeuralNetworks_in_preparation" => Entry(Access("", "", ""), BibInternal.Name[Name("", "Kim", "", "Jinrae", ""), Name("", "Kim", "", "Youdan", "")], "", Date("", "", "2099"), BibInternal.Name[], Eprint("", "", ""), "kimPartiallyConvexNeuralNetworks_in_preparat…

But I wanna get the reverse-ordered result.

Even if there is a simple way of reversing the order of an OrderedDict, I think it would be much convenient if a keyword argument is provided for "reversing the order".

Current sorting rules look like:

const sorting_rules = Dict{Symbol, Vector{Symbol}}(
    :nty  => [:authors;:editors;:title;:date],
    :nyt  => [:authors;:editors;:date;:title],
    :y    => [:date]
);

so maybe we need something like

:nty
:n-ty  # reverse only t
:-y  # reverse y
...  # etc