Fixing v1.18.X compiler warnings

[mjaric]

• Fixing compiler warning caused by marking char list '...' obsolete and requiring ~c sigl
• Removing annoying stderr output when Port is not found (tls module)
• fixing test setup so sqlcmd trust local SSL server certificate
• upgrading deps

  castore 1.0.7 => 1.0.14
  certifi 2.9.0 => 2.15.0
  db_connection 2.5.0 => 2.7.0
  decimal 2.0.0 => 2.3.0
  earmark_parser 1.4.33 => 1.4.44
  ex_doc 0.30.6 => 0.38.2 (minor)
  excoding 0.1.2 => 0.1.5
  hackney 1.18.1 => 1.24.1
  jason 1.4.0 => 1.4.4
  makeup 1.1.0 => 1.2.1
  makeup_elixir 0.16.1 => 1.0.1 (major)
  makeup_erlang 0.1.2 => 1.0.2 (major)
  mimerl 1.2.0 => 1.4.0
  nimble_parsec 1.3.1 => 1.4.2
  parse_trans 3.3.1 => 3.4.1
  rustler_precompiled 0.7.1 => 0.8.2 (minor)
  telemetry 1.2.1 => 1.3.0
  tzdata 1.1.1 => 1.1.3
  unicode_util_compat 0.7.0 => 0.7.1

Resolves #171