added able return integer value if cell has int and float if cell has float number for xls and xlsx

Author: kaktusyaka

lib/roo/excel.rb

@@ -323,7 +323,7 @@ def set_cell_values(sheet,row,col,i,v,vt,formula,tr,font)
 
     case vt # @cell_type[sheet][key]
     when :float
-      @cell[sheet][key] = v.to_f
+      @cell[sheet][key] = Integer(v) rescue Float(v)
     when :string
       @cell[sheet][key] = v
     when :date

lib/roo/excelx.rb

@@ -326,7 +326,7 @@ def set_cell_values(sheet,x,y,i,v,vt,formula,tr,str_v,
     @cell[sheet]    = {} unless @cell[sheet]
     case @cell_type[sheet][key]
     when :float
-      @cell[sheet][key] = v.to_f
+      @cell[sheet][key] = Integer(v) rescue Float(v)
     when :string
       @cell[sheet][key] = str_v
     when :date