update tsl2561 code, update delay time to 400ms

Guo Wenxue

2019-07-05 6d7b28e6a7836988247c188f4284861fe33410ae

 modules/python/sht20.py

old mode 100644
new mode 100755
@@ -1,4 +1,6 @@
#!/usr/bin/python
#-*- coding: utf-8 -*-

import fcntl
import time
import unittest