fix(deprecations): Fix dep

[raksonibs]

Fix numerous deprecations on compile:

Compiling 1 file (.ex)
warning: Atom.to_char_list/1 is deprecated. Use Atom.to_charlist/1 instead
Found at 2 locations:
  lib/mix/tasks/dialyze.ex:292
  lib/mix/tasks/dialyze.ex:337

warning: Enum.filter_map/3 is deprecated. Use Enum.filter/2 + Enum.map/2 or for comprehensions instead
Found at 2 locations:
  lib/mix/tasks/dialyze.ex:124
  lib/mix/tasks/dialyze.ex:287

warning: HashSet.difference/2 is deprecated. Use the MapSet module instead
Found at 2 locations:
  lib/mix/tasks/dialyze.ex:363
  lib/mix/tasks/dialyze.ex:367

warning: HashSet.intersection/2 is deprecated. Use the MapSet module instead
Found at 2 locations:
  lib/mix/tasks/dialyze.ex:217
  lib/mix/tasks/dialyze.ex:365

warning: HashSet.new/0 is deprecated. Use the MapSet module instead
Found at 3 locations:
  lib/mix/tasks/dialyze.ex:216
  lib/mix/tasks/dialyze.ex:257
  lib/mix/tasks/dialyze.ex:463

warning: HashSet.put/2 is deprecated. Use the MapSet module instead
Found at 2 locations:
  lib/mix/tasks/dialyze.ex:341
  lib/mix/tasks/dialyze.ex:463

warning: HashSet.size/1 is deprecated. Use the MapSet module instead
Found at 5 locations:
  lib/mix/tasks/dialyze.ex:218
  lib/mix/tasks/dialyze.ex:388
  lib/mix/tasks/dialyze.ex:402
  lib/mix/tasks/dialyze.ex:416
  lib/mix/tasks/dialyze.ex:428

warning: HashSet.to_list/1 is deprecated. Use the MapSet module instead
  lib/mix/tasks/dialyze.ex:223