feat: import支持dot_hash的方式，进行json类型属性的赋值

lib/tallty_import_export/import.rb

@@ -108,8 +108,9 @@ module TalltyImportExport
 
     def convert_data(line_info)
       info = line_info.with_indifferent_access
-      import_headers_result.each_with_object({}) do |header, h|
+      import_headers_result.each_with_object({}.with_indifferent_access) do |header, h|
         k = header[:key]
+        k_arr = k.to_s.split(/\./)
         v = info[k]
         # header[:convert] = handle_xxx
         # handle_xxx(val, processing_line_info, raw_line_info)
@@ -123,6 +124,12 @@ module TalltyImportExport
         elsif header[:finder]
           # $SAFE = 2
           h[k.to_sym] = eval header[:finder]
+        elsif k_arr.size > 1
+          # hash设置
+          attr = k_arr.first
+          val = { k_arr[1..-1].join('.') => v }.to_nested_hash
+          h[attr.to_sym] ||= {}
+          h[attr.to_sym].merge! val
         else
           h[k.to_sym] = val
         end