Update README.md (#1753)

README.md

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 # Code Property Graph 
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 A simple library to extract a *code property graph* out of source code. It has support for multiple passes that can extend the analysis after the graph is constructed. It currently supports C/C++ (C17), Java (Java 13) and has experimental support for Golang, Python and TypeScript. Furthermore, it has support for the [LLVM IR](http://llvm.org/docs/LangRef.html) and thus, theoretically support for all languages that compile using LLVM.