Deprecated doc for construction of PriorityQueue

[scls19fr]

Hello,

according doc https://github.com/JuliaCollections/DataStructures.jl/blame/4cd14487c7f66f4e2a61d0e703b06b3a6a660a4e/doc/source/priority-queue.rst#L12
and docstring

DataStructures.jl/src/priorityqueue.jl

Line 7 in 4cd1448

PriorityQueue(K, V, [ord])

construction of a PriorityQueue could be done using PriorityQueue(K, V) where K and V are types of keys and priorities but it raises a warning

julia> PriorityQueue(Int, String)
WARNING: PriorityQueue{K, V}(::Type{K}, ::Type{V}) is deprecated, use PriorityQueue{K, V}() instead.
Stacktrace:
 [1] depwarn(::String, ::Symbol) at ./deprecated.jl:70
 [2] DataStructures.PriorityQueue(::Type{Int64}, ::Type{String}) at ./deprecated.jl:57
 [3] eval(::Module, ::Any) at ./boot.jl:235
 [4] eval_user_input(::Any, ::Base.REPL.REPLBackend) at ./REPL.jl:66
 [5] macro expansion at ./REPL.jl:97 [inlined]
 [6] (::Base.REPL.##1#2{Base.REPL.REPLBackend})() at ./event.jl:73
while loading no file, in expression starting on line 0
DataStructures.PriorityQueue{Int64,String,Base.Order.ForwardOrdering} with 0 entries

Maybe it should be updated.

Thanks for the nice work

Kind regards