fix: processing arrays for required except

[dominikb]

What is the purpose of this pull request?

The documented feature of allowing arrays for the env: { except: } option is broken.

Reproducible example

require 'bundler/inline'

gemfile(true) do
  source 'https://rubygems.org'

  gem 'anyway_config'
end

class MyConfig < Anyway::Config
  attr_config :user

  required :user, env: { except: [ 'test' ] }
end

Anyway::Settings.current_environment = 'test'

puts "Environment: #{Anyway::Settings.current_environment}"
[
  "Anyway::Settings.matching_env?('test')           # (true expected) ",
  "Anyway::Settings.matching_env?({except: 'test'}) # (false expected)",
  "Anyway::Settings.matching_env?(except: ['test']) # (false expected)",
].each { |example| puts("#{example} => #{eval(example)}")}

begin
  MyConfig.new
rescue StandardError => e
  puts e
end

Output

Fetching gem metadata from https://rubygems.org/...........
Resolving dependencies...
Environment: test
Anyway::Settings.matching_env?('test')           # (true expected)  => true
Anyway::Settings.matching_env?({except: 'test'}) # (false expected) => false
Anyway::Settings.matching_env?(except: ['test']) # (false expected) => true
The following config parameters for `MyConfig(config_name: my)` are missing or empty: user

What changes did you make? (overview)

Is there anything you'd like reviewers to focus on?

Checklist

• I've added tests for this change
• I've added a Changelog entry
• I've updated a documentation

[palkan]

Thanks!