👌📚 Added LGTM and black badge

README.md

@@ -5,7 +5,10 @@
 [![Tests](https://github.com/glotaran/pyglotaran-extras/actions/workflows/test.yml/badge.svg)](https://github.com/glotaran/pyglotaran-extras/actions/workflows/test.yml)
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 Supplementary package for pyglotaran with (example) plotting code for use with the pyglotaran package.