Update README.md

Author: nikosxenakis

README.md

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 # ICE_Editor
 
+[![Language grade: JavaScript](https://img.shields.io/lgtm/grade/javascript/g/nikosxenakis/ICE_Editor.svg?logo=lgtm&logoWidth=18)](https://lgtm.com/projects/g/nikosxenakis/ICE_Editor/context:javascript)
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 ## Description
 
 ICE Editor is my bachelor thesis during my undergraduate studies in Computer Science