chore(deps): bump csv from 1.4.4 to 2.3.1

Bumps [csv](https://github.com/beatrichartz/csv) from 1.4.4 to 2.3.1.
- [Release notes](https://github.com/beatrichartz/csv/releases)
- [Changelog](https://github.com/beatrichartz/csv/blob/master/Changelog.md)
- [Commits](beatrichartz/csv@v1.4.4...v2.3.1)

Signed-off-by: dependabot[bot] <support@dependabot.com>

Author: dependabot-preview[bot]

apps/cf/mix.exs

@@ -49,7 +49,7 @@ defmodule CF.Mixfile do
       {:html_entities, "~> 0.3"},
       {:httpoison, "~> 0.11"},
       {:poison, "~> 3.1"},
-      {:csv, "~> 1.4.4"},
+      {:csv, "~> 2.3.1"},
       {:not_qwerty123, "~> 2.2"},
       {:bamboo, github: "thoughtbot/bamboo"},
       {:hackney, "~> 1.6"},

mix.lock

@@ -22,7 +22,7 @@
   "cowlib": {:hex, :cowlib, "1.0.2", "9d769a1d062c9c3ac753096f868ca121e2730b9a377de23dec0f7e08b1df84ee", [:make], [], "hexpm"},
   "credo": {:hex, :credo, "1.1.0", "e0c07b2fd7e2109495f582430a1bc96b2c71b7d94c59dfad120529f65f19872f", [:mix], [{:bunt, "~> 0.2.0", [hex: :bunt, repo: "hexpm", optional: false]}, {:jason, "~> 1.0", [hex: :jason, repo: "hexpm", optional: false]}], "hexpm"},
   "crontab": {:hex, :crontab, "1.1.3", "735ec1b63d33f8999d6b166da8ee773b4393fa873bdd24884f8ce4d5af730da5", [:mix], [{:ecto, "~> 1.0 or ~> 2.0 or ~> 2.1", [hex: :ecto, repo: "hexpm", optional: true]}], "hexpm"},
-  "csv": {:hex, :csv, "1.4.4", "992f2e1418849a326fd1d9287801fa2d86091db4f9611f60781da6d236f64cd4", [:mix], [{:parallel_stream, "~> 1.0.4", [hex: :parallel_stream, repo: "hexpm", optional: false]}], "hexpm"},
+  "csv": {:hex, :csv, "2.3.1", "9ce11eff5a74a07baf3787b2b19dd798724d29a9c3a492a41df39f6af686da0e", [:mix], [{:parallel_stream, "~> 1.0.4", [hex: :parallel_stream, repo: "hexpm", optional: false]}], "hexpm"},
   "db_connection": {:hex, :db_connection, "1.1.3", "89b30ca1ef0a3b469b1c779579590688561d586694a3ce8792985d4d7e575a61", [:mix], [{:connection, "~> 1.0.2", [hex: :connection, repo: "hexpm", optional: false]}, {:poolboy, "~> 1.5", [hex: :poolboy, repo: "hexpm", optional: true]}, {:sbroker, "~> 1.0", [hex: :sbroker, repo: "hexpm", optional: true]}], "hexpm"},
   "decimal": {:hex, :decimal, "1.8.1", "a4ef3f5f3428bdbc0d35374029ffcf4ede8533536fa79896dd450168d9acdf3c", [:mix], [], "hexpm"},
   "distillery": {:hex, :distillery, "2.0.12", "6e78fe042df82610ac3fa50bd7d2d8190ad287d120d3cd1682d83a44e8b34dfb", [:mix], [{:artificery, "~> 0.2", [hex: :artificery, repo: "hexpm", optional: false]}], "hexpm"},