code: def case_insensitive(self):
          
          if "--case-ins" in self.flag:
              data = []
              data = Utils().package_name(self.PACKAGES_TXT)
              data_dict = Utils().case_sensitive(data)
              for pkg in self.packages:
                  index = self.packages.index(pkg)
                  for key, value in data_dict.iteritems():
                      if key == pkg.lower():
                          self.packages[index] = value
docs: Matching packages distinguish between uppercase and
          lowercase