Tests failing on 1.11 due to missing doc language definition

[iloveitaly]

Looks like adding a definition for %{} fixes the issue.

09:54:29.931 [error] Task #PID<0.221.0> started from #PID<0.94.0> terminating
** (FunctionClauseError) no function clause matching in InchEx.Docs.docstring/1
    (inch_ex 2.0.0) lib/inch_ex/docs.ex:78: InchEx.Docs.docstring(%{})
    (inch_ex 2.0.0) lib/inch_ex/docs.ex:57: InchEx.Docs.cast_moduledoc/5
    (inch_ex 2.0.0) lib/inch_ex/docs.ex:47: InchEx.Docs.split_module_docs/6
    (inch_ex 2.0.0) lib/inch_ex/cli/commands/suggest_command.ex:30: InchEx.CLI.Commands.SuggestCommand.fetch_and_evaluate_docs/1
    (elixir 1.12.3) lib/task/supervised.ex:90: Task.Supervised.invoke_mfa/2
    (elixir 1.12.3) lib/task/supervised.ex:35: Task.Supervised.reply/5
    (stdlib 3.14.1) proc_lib.erl:226: :proc_lib.init_p_do_apply/3