csv: allow all Ruby csv parsing options

Closes #149

Generalization on PR #146 by Qgel. Thanks for the contribution!

lib/squib/api/data.rb

@@ -2,6 +2,7 @@ require 'roo'
 require 'csv'
 require_relative '../args/input_file'
 require_relative '../args/import'
+require_relative '../args/csv_opts'
 
 module Squib
 
@@ -34,8 +35,8 @@ module Squib
     import = Args::Import.new.load!(opts)
     file = Args::InputFile.new(file: 'deck.csv').load!(opts).file[0]
     data = opts.key?(:data) ? opts[:data] : File.read(file)
-    sep = opts.key?(:sep) ? opts[:sep] : ','
-    table = CSV.parse(data, headers: true, converters: :numeric, col_sep: sep)
+    csv_opts = Args::CSV_Opts.new(opts)
+    table = CSV.parse(data, csv_opts.to_hash)
     check_duplicate_csv_headers(table)
     hash = Hash.new
     table.headers.each do |header|

lib/squib/args/csv_opts.rb

@@ -0,0 +1,25 @@
+require 'csv'
+
+module Squib
+  # @api private
+  module Args
+    class CSV_Opts
+
+      def initialize(opts)
+        opts = opts.keep_if { |k, _v| CSV::DEFAULT_OPTIONS.key? k}
+        @hash = CSV::DEFAULT_OPTIONS.merge(opts).merge(required)
+      end
+
+      def to_hash
+        @hash
+      end
+
+      private
+
+      def required
+        { headers: true, converters: :numeric }
+      end
+
+    end
+  end
+end