EOL for Python 3.7 (#2852)

Author: chayim

README.md

@@ -13,6 +13,10 @@ The Python interface to the Redis key-value store.
 
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+**Note: ** redis-py 5.0 will be the last version of redis-py to support Python 3.7, as it has reached [end of life](https://devguide.python.org/versions/). redis-py 5.1 will support Python 3.8+.
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 ## Installation
 
 Start a redis via docker: