Bump xml_builder from 2.1.0 to 2.1.1

Bumps [xml_builder](https://github.com/joshnuss/xml_builder) from 2.1.0 to 2.1.1.
- [Release notes](https://github.com/joshnuss/xml_builder/releases)
- [Commits](https://github.com/joshnuss/xml_builder/commits)

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

Author: dependabot-support

mix.lock

@@ -80,5 +80,5 @@
   "timex_ecto": {:hex, :timex_ecto, "3.3.0", "d5bdef09928e7a60f10a0baa47ce653f29b43d6fee87b30b236b216d0e36b98d", [:mix], [{:ecto, "~> 2.2", [hex: :ecto, repo: "hexpm", optional: false]}, {:timex, "~> 3.1", [hex: :timex, repo: "hexpm", optional: false]}], "hexpm"},
   "tzdata": {:hex, :tzdata, "0.5.19", "7962a3997bf06303b7d1772988ede22260f3dae1bf897408ebdac2b4435f4e6a", [:mix], [{:hackney, "~> 1.0", [hex: :hackney, repo: "hexpm", optional: false]}], "hexpm"},
   "unicode_util_compat": {:hex, :unicode_util_compat, "0.4.1", "d869e4c68901dd9531385bb0c8c40444ebf624e60b6962d95952775cac5e90cd", [:rebar3], [], "hexpm"},
-  "xml_builder": {:hex, :xml_builder, "2.1.0", "c249d5339427c13cae11e9d9d0e8b40d25d228b9ecc54029f24017385e60280b", [:mix], [], "hexpm"},
+  "xml_builder": {:hex, :xml_builder, "2.1.1", "2d6d665f09cf1319e3e1c46035755271b414d99ad8615d0bd6f337623e0c885b", [:mix], [], "hexpm"},
 }