Update README.md

bitbank2 · web-flow · commit 5f627670e2de · 2020-03-08T20:15:03.000-04:00
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 Bit Bang I2C library
-Copyright (c) 2018-2019 BitBank Software, Inc.
+--------------------
+Copyright (c) 2018 BitBank Software, Inc.
 Written by Larry Bank (bitbank@pobox.com)
 Project started 10/12/2018
 
