Merge branch 'bump/min-elixir-1.10' into 'develop'

Bump minimum Elixir version to 1.10

See merge request pleroma/pleroma!3741

priv/templates/sample_config.eex

@@ -3,11 +3,7 @@
 # NOTE: This file should not be committed to a repo or otherwise made public
 # without removing sensitive information.
 
-<%= if Code.ensure_loaded?(Config) or not Code.ensure_loaded?(Mix.Config) do
-  "import Config"
-else
-  "use Mix.Config"
-end %>
+import Config
 
 config :pleroma, Pleroma.Web.Endpoint,
    url: [host: "<%= domain %>", scheme: "https", port: <%= port %>],