Update README.md

Author: snorklerjoe

README.md

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 # CubeServer-api-micropython
+[![Maintainability](https://api.codeclimate.com/v1/badges/368c4a6572655726b08a/maintainability)](https://codeclimate.com/github/snorklerjoe/CubeServer-api-micropython/maintainability)
+
 The MicroPython version of the data API wrapper for a high-school STEM competition