Update version on hex

[hamstah]

Hey, Could you update the version on hex?

warning: variable "deps" does not exist and is being expanded to "deps()", please use parentheses to remove the ambiguity or change the variable name
  ./deps/red_black_tree/mix.exs:12

warning: variable "package" does not exist and is being expanded to "package()", please use parentheses to remove the ambiguity or change the variable name
  ./deps/red_black_tree/mix.exs:13

==> red_black_tree
Compiling 2 files (.ex)
warning: use Dict is deprecated, use the Map module for working with maps or the Keyword module for working with keyword lists
  lib/red_black_tree.ex:16


== Compilation error in file lib/red_black_tree.ex ==
** (ArgumentError) Access is not a protocol
    (elixir) lib/protocol.ex:76: Protocol.assert_protocol!/2
    lib/red_black_tree.ex:623: (file)
    (elixir) lib/kernel/parallel_compiler.ex:121: anonymous fn/4 in Kernel.ParallelCompiler.spawn_compilers/1
could not compile dependency :red_black_tree, "mix compile" failed. You can recompile this dependency with "mix deps.compile red_black_tree", update it with "mix deps.update red_black_tree" or clean it with "mix deps.clean red_black_tree"

Using the github url in mix.exs seems to work

Thanks